Aku no Musume (The Daughter of Evil)

Sung by Rin Kagamine
Music and Lyrics by Akuno-P (Mothy)
Video here
The song tells the story of an evil princess, Rin, who ruled the yellow Kingdom, and she always get what she wanted. She also have a servant that looked like her, Len, wich was her brother. The story begins with the evil princess falling in love with a man from the blue kingdom (Kaito), but he is already in love with a girl from the green kingdom (Miku). In a jealous rage, the evil princess orders to destroy and burn to the ground the green kingdom. Later, a woman in a red armor (Meiko) enters the evil princess castle with the angy people in the yellow kingdom, and captures the evil princess and beheaded her.

Aku no Menshitsukai (the servant of evil)

Sung by Len
Music and Lyrics by Akuno-P (Mothy)
Video here
This song is a parallel story of the Daughter of Evil, and tells the song trough the point of view of the servant (Len). They were twins but because of some events not mentioned she becomes the princess (Rin) and he, her servant. Altrhough people see the evil princess as cold and mean, he sees her soft and innocent side. On a visit to the green Kingdom, he happens to fall in love with a girl (Miku). But because of the Princess's jealousy she destroys the green kingdom, and he kill the girl he loved, without hesitation. Later, the uprising army led by the woman in red armor (Meiko) attacked the palace intenting to capture the evil princess. But before they capture her the servant switches places with his twin, the princess, and the woman in red armor captures Len thinking he is the princess. He is beheaded in front of the town and the princess it self, but the servant tell us through the song that he has no regrets and that he is glad that he could served his sister till the end. Hius last wish was if he reincarnated, he hoped to be with her again.

Regret Message

Sung by Rin
Music abd Lyrics by Akuno-P (mothy)
video here
the sequel of Daughter of evil and Servant of evil. Also known as Message of regret, tells the story after the servant was beheaded. The princess realizes that it had been her own selfishness that has killed Len. She goes to the beach and throwns a messege, a wish, on a bottle into the sea. this scene brings her back the memories of when the servant was alive telling her that if you put a wish on a paper inside a bottle and let it float in the sea, it will become true. Then the princess finds the bottle Len sended years back and she reads it "If we could be reborn, I want to be with you again", wich was also the wish he made before he died.

Re birthday

sung by Len
Music and Lyrick by Akuno-P (Mothy)
video here
The sequel of Regret Message. It tell what happen to the servant (Len) after he was beheaded. He is alone in a dark room no being able to see, then he hears a voice and starts to remembering the evil he has done. Then he notice that his arms are in red handcuffs (representing the bloodshed) and his ankles are in blue chains (representing the tears shed). Sunddenly Len starts to hear a melody, that calms him down. Then a voice tells him that he is forgiven for his actions from the past, and is given a new birthday and reborn because of the wish the Princess, in Regret Message, has sent to the sea.

Gekokujou (Rebellion/Revolution)

Sung by Rin and Len
Music and Lyrics by Ichigyou-P
video here
the song is about superpasing Miku as number 1. Its a fun, unbeat rap song. Len states that the rumors about him as a shota is false and that his voice is his gratest attribute and talent. While Rin states that she is way sweeter, kinder, and beautiful than Miku.

Kokoro (Heart or Soul)

sung by Rin
Music and Lyrics by Toraboruta-P
video here
in Kokoro, Rin is a robot made by a lonely scientist. But she is missing something that can't be found on a program, a heart and a soul. Eventually, the scientist passes away, and the robot wonders what the sciebtrist was making for her all that time. She opens the program and awakens her feelings, overcome by emotion the robot sings her feelings out. But kokoro was to great for her fake body that the robot stops functioning.

Kokoro/Kiseki (heart or soul/ Miracle)

Sung by Len and Rin
Music and Lyrics by Jun-P
Video here
KOKORO/KISEKI serves as a prologue to KOKORO, telling the story of the scientist who created the robot in KOKORO. The scientist, represented by Len, creates a robot but realizes that she is missing something important: her kokoro. He wishes to share happiness and sadness with her, and so he begins working tirelessly at creating a heart and mind for her. However, as he works the scientist becomes aware of how his life will eventually come to an end. As he begins to lose hope, a miracle (KISEKI) suddenly happens: he recieves a message from the robot from the future, after she has created her own kokoro. Seeing how happy and yet tragic she looks, and realizing that his research was not all for nothing, the scientist obtains peace and passes away in tranquility.

Meltdown

Sung by Rin
Lyrics by Kuma
Compose and arranged by iroha
Video here
Rin jumps into a reactor core/nuclear reactor to purge herself of her sins, including (apparently) choking someone, possibly to death. The little Rin represents the past in her life and all the good things that happened before she commited her many sins.

Noroi no Megane (The Cursed Glasses)

Sung by Rin
Music and Lyrics by Bucchigiri-P
Video here
Based heavily upon the RPG's of the 8-bit NES era, The Cursed Glasses thrusts Rin into a strange world. An odd-looking priest appears, proclaiming Rin to be the saviour of the world and gives her the glasses to wear. Too late she finds she cannot take them off and even worse, they distort reality around her. She struggles to comprehend what is going on through her new vision but eventually the strain of wearing the glasses becomes too much to bear and she releases a fit of anger towards the priest. In the last few seconds, she trips and falls, and the glasses fall right off her face.

Shuujin (prisoner)

Sung by Len
Composed by Shuujin-P
video here
The setting according to the video seems to be in the time of the infamous holocaust during the World War II. Len is one of the many prisoners who were sent to concentration camps. As he does his routine of cleaning the camp, he encounters a beautiful young maiden (Rin). Len is fascinated by her so he decides to write her a letter one day, hoping the she would answer. His prayers being granted, his letter was given a reply. On a daily basis, they would meet for a brief moment and fly a paper plane across the barbed-wire wall. He found joy in his life just by getting letters from her--though he never conveyed his feelings for her. Until a day came when the mysterious girl decided to head off somewhere far and bade farewell to him. (Though there is an explanation as to why she did go away, it was not interpreted until the reply to the song came). As she went away, he kept all her letters and treasured them dearly until one of the Generals and his henchmen decided to torment the young man by making fun of his attachment to the letters. They went as far as to tear the letters which triggered Len's anger and punched the General. In retort, the men decided to put him in the gas chambers to die as a punishment.

Kami Hikooki (Paper Plane)

Sung by Rin
Composed by Shuujin-P
video here
This song is the reply to Len's "Prisoner" but in Rin's point of view--the young girl whom Len had fallen for. In the video, Rin is the daughter of one of the Generals' in-charge with the concentration camp on which Len was in. Though aware of what is happening around her, she still sought for the accompany of Len, even with her frail body. She goes to meet with Len and fly him a paper plane--the letter--even though she suffers from a terrible illness which was never clarrified in the story. She eventually falls for him but as soon as she does, her father found out about her affair and forbade her to go out of the hospital and meet the boy. As time goes by, Rin gets weaker and weaker that moving her legs proved to be very difficult for her. She then decides to bid farewell to Len properly so he won't have to search for her or ponder of what happened to her. She makes an excuse that she'll be going somewhere far away, but as soon as she was about to leave, Len tells her that he will wait for her and that he'll treasure each and every letter she gave him. As the story goes on, it is shown that Rin's father was the one who put Len in even more agony by ripping the letters from Rin. He was also the one who gave the order to execute Len. Rin on the other hand, is already paralyzed from the illness that she couldn't even grasp one of Len's letters. However, seeing how devoted Rin has become to Len, the father picked up the letter and placed it in her hand as a final act of kindness to his dying daughter. Rin is shown smiling when she dies. At the end they meet in heaven.

Trick or treat

sung by Rin and Len
Music and Lyrics by OSTER-project
video here
"Trick and Treat" is a mild horror song created for Halloween. It is about Rin and Len, tricking and treating Miku, and apparently devouring her. The title of the song refers to the trick of deceiving and punishing of Miku, while the treat is about the various sweets and syrups they take from her. While Rin and Len initially appear innocent, welcoming, and friendly, they later appear as insane and mad. They invite the clueless Miku to play a "game" with them and blindfold her. Later, Len speaks of how flawless love does not exist and Rin sings of how through the blindfold there were things she thought she'd never see concluding with both saying how "lantern shadows that grew at night unconsciously frightened me." After their spiel, Miku's blindfold starts to fall off. Both Len and Rin at this point remove their friendly facades asking Miku if she really would like to be blinded. They then state that she wears many lies and that they should continue their "game" or "play." Miku at this point is mortified as the two friendly people she knew have shown their true intentions of possibly devouring her or simply killing her.

Kyoufu Gaaden (Fear Garden)

Sung by Rin
Music and Lyrics by Chaa-p
video here
Rin sings about her lovely garden of human arms as the stems and hands of others as the flowers. Near the end of the song Rin sighs and says it's all a lie; she never took the arms and hands of the other Vocaloids, though she giggles and says that maybe she did. A final picture shows Len's arm in a pot.

Emitting Invisible Smoke

Sung by Len and Rin
by ___?
video here

Bringing the Rain

Sung by Len
by ___?
video here

Transmit

Sung by Rin
Music and lyrics by Signal-P
Video here
Signal-P, the producer of this song is said to have found the best way to tune Rin's voice, by switching the sound banks of Act1 and Act2 by the letter. The song is about never giving up hope and eventually reaching your goals, and focusing on believing that your dreams will come true.

Dolls

Sung by Rin
Music and lyrics by Rozenkreuz-P
video here
A doll with a living mind inside of her wonders why she was born and why her heart is made of silver after her creator passes away. For many years she sings, dances and hopes that one day she could go to 'that place' where her creator has gone. After many years, she attempts to 'go' to that place with her body which was almost broken and she finally sees the creator she lost so long ago. There is also a version for Miku by the same author.

Shut up, Get out

Sung by Rin
spoken words by Len & Gakupo
Music and lyrics by Hi-G
Video here

Dreaming Leaf

Cover by Rin
Original music and lyrics written by OSTER-project
Originally sung by Miku Hatsune
Music arranged and Rin's voice edited by baker
video here

Iroha Uta (Iroha Song)

Sung by Rin
Music and lyrics by Ginsaku
Video here
In this song, Rin sings to an unknown lover about how she is willing to change herself for them, by using figurative examples, including a dog, a cat, a camilla flower, and a rose. The song uses the iroha, which is an old Japanese poem that is famous for its a perfect pangram, containing each character of the Japanese syllabary exactly once. Because of this, it was also used as an ordering for the syllabary in old days. There is also a popular version of the song sung by both Rin and Len, and versions of MEIKO, KAITO, Miku, Len singing alone, Gakupo (this one with different lyrics, called "male version"), GUMI, Teto and possibly others.

Skeleton Life

Sung by Rin
Music and Lyrics by Lamune-P
video here
This song is about Rin having to crossdress as a boy to learn how to "swim" and "fly". A majority of the lyrics are vague, and could merely be interpreted as Rin trying to learn things she wouldn't normally or with some deeper meaning.

Kodoku no Hate (In the End of Solitude)

Sung by Rin
Music and Lyrics by Nakanohito
Illustrated by NEGI
Video here

SPICE!

Sung by Len
Music and lyrics by Ryuusei-P
video here
The Song SPICE! potrays Len as a young, womanizing man and also a playboy. He states that he does not understand love and seems to be not-interested-in "settling down" for real life relationship. Later the song "RIP= RELEASE" was written by Ryuusei-P as a reply to SPICE! and sung by Luka Megurine. Though the lyrics and the original video are just telling how he is enjoying the affairs and do not mention who the women are, there are various Fanmade PVs with different interpretations and other vocaloids such as Rin, Miku, Meiko, Luka and Kaito are depicted. In some of them Rin is the one that Len "truly" loves. Many comments critized the song of Len being too young to be a "pimp".

Fire Flower

Sung by Len
Music and lyrics by halyosy
Video here
Len sings about his love and dream under the sky that colored with the fireworks. In some of the Fanmade PVs of this song, Rin and Len appear as a couple instead of siblings and the different times in their relationship are shown.

Ike Ren Ka (Cool Love Song)

Sung by Len
Music by Lelele-P
lyrics by Darari
video here
Len sings that he pretends he does not know what love is but actually he is already in love and not confident enough to tell. Since the original video and lyrics do not depict who he loves, many Fanmade PVs with different interpretations have been made. In Japanese "L" is not distinguished from "R" and the title implies the meaning "Ike Len Ka (Cool Len Song)".

Kagamine Len no Bousou (The Rampage of Len Kagamine)

Sung by Len
background vocals by Rin & Miku Hatsune
Music and lyrics by CosMo(Bousou-P)
Video here

Discotheque Love

Sung by Len
Music and Lyrics by Lelele-P
video here
This song depicts Len as a shy young man wanting to dance with the "disco queen" which happens to be Rin. He hesitates to ask her as she is surrounded by guys depicted by KAITO and Kamui Gakupo, but he decided to muster up his courage and ask her and she says yes and they eventually start dancing together.

Out of Eden

Sung by Len
Music by Kouhei/K's Sound Project
Lyrics by orange
Illustration by Akiakane
Original video by Acha/Doara-P
Video here

Imitator

Sung by Len
Music and Lyrics by U-ta-P
video here

Ore no Road Roller da! (It's My Road Roller!)

Sung by Rin and Len
Music and lyrics by Meiyokaichou-P (Oyatsu-P)
Video here
Rin and Len talk about their journey from creation at the company that made them (Crypton), to be bought by the consumer.After they are bought and installed,they behave at first, but they become getting out of hand as they get used to the new circumstances. Another very short variation of this song is mixed with Daughter of Evil. In the Fanmade PV, Rin rushes in through the middle of the execution, rolls over the guillotine and rescues Len from the fate of a rolling head. A humorous take on the story, yet nonetheless leave many fans wishing that this was the actual ending, instead of Len meeting his horrible demise, dressed as Rin. Though there is a PV like that, the original lyrics have nothing to do with the 'Daughter of Evil' series.

Adolescence

Sung by Rin and Len
Music arranged by Signal-P
Title/Logo by Sacrow
Lyrics arranged by Orange
Illustrations by Hiro Tamura
video here
Adolescence is an arrangement of Cendrillon which was written by Signal-P, and originally sung by Miku Hatsune and Kaito. Orange, who wrote the lyrics, says that the song is about twins (Rin and Len) who were like two peas in a pod and grew up to come to the age of puberty where they can't share the same bed as they did when they were little children. They no longer are perfect look-alike like a reflection in the mirror since they hit adolescence and their bodies are developing differently. They both sing about how hard it is to be separated because they are always together. While Rin states throughout the song that she doesn't want Len to leave her, he remains hesitant throughout the song until the end when he states that he will no longer retreat from her.

Yumezakura (Cherry Blossom of Dream)

Sung by Rin and Len
Music and lyrics written by Hitoshizuku-P
Video here
This song is about the apparently forbidden love between a young noblewoman represented by Rin and an violin player by Len. She was to be married to a rich man represented by Gakupo, but she met a boy who was playing the violin under the cherry tree on her way home after a party and fell in love at first sight. The boy was left an orphan because of the earthquake disaster. They both wished that their love could last forever, but they decided to break it off

Rin Rin Signal

Sung by Rin and Len
Music and Lyrics by Signal-P
video here

Gemini

Sung by Rin and Len
Music and Lyrics by DixieFlatline
Video here
Gemini is a song sung by both Rin and Len. The tone and wording of the song is rather vague, but many have taken it as a song about them as twins since Len likens himself and Rin to Gemini in the sky. Throughout the song, Rin sings about how she goes through many troubles throughout her life, with Len coming to her aid and letting her feel as though she is not alone. The song also has references to astronomy and astrology, one time even saying that they were destined to meet 'beyond the night sky'.

69 (Six Nine)

Sung by Rin and Len
Music by Nio-P
Lyrics by Mache and Nio-P
video here
This song opens with Len singing of how in a dream Rin is always in slight pain. It is revealed that she is bedridden and cannot move her body, save for her head. Though Len worries for her, he does not mind, stating that he actually prefers it and takes care of her. Rin then takes over in the second part. Though she loves Len deeply and is grateful for all that he does for her, she still does not feel like she deserves it. Despite Len's reassurance that everything will be alright, she reaches the point where she cannot take it and dies with a final thank you to Len and wishing for him to love another as he had loved her. Many Fanmade PVs of this song interpret Rin's immobility.

Juvenile

Sung by Rin and Len
Music and Lyrics by DixieFlatline
Video by Mitosa
Video here
In this song, Rin and Len are shown as a couple. Len sings that he is a "cool" guy, since the cutest kid in Rin's class asked him for her email, due to the fact that Rin is shown a good-looking girl, she is probably a popular girl. Len loves Rin, but he isn't sure what Rin thinks of him. Rin knows Len loves her and she loves Len as well, but instead of being with Len, she keeps looking at other guys. Len thinks other guys aren't good enough for Rin, unlike himself. Len sings that Rin is a "fickle cat with an easily changed heart" which means she keeps on looking at other guys. Rin says she might as well love Len, even though he might be a little small and childish. Len tells Rin to come back to him, since she has no other choice. Frustrated, Rin says what Len said is "out of fashion" and he suddenly becomes a patient guy. Rin is also frustrated at Len when he calls her a "tsundere" and she says she isn't a "tsundere". In the end, the both of them are together.

Shiro-kuro Byoutou (Monochrome Ward)

Sung by Rin and Len
spoken words voiced by Rin, Len, Meiko
Music and Lyrics by Yugami-P
video here
In the original video, Len is sitting on the bed surrounded by medical devices. As Len asks where the exit is, Rin answers “There”. Then the sounds of running footfalls and a blood-soaked music box echoes hollowly. When Len asks the same question and Rin answers the same again, a butcher knife is depicted and a girl’s scream resounds. What the lyrics and original video tell are very abstract and various different Fanmade PVs have been made for this song.

Yami no Dance Site (Dance Site of Darkness)

Sung by Rin and Len Music
lyrics by Boomerangpants-P
Video here

siGrE

Sung by Rin and Len
Music and lyrics by Suzuki-P
video here
This is a song of a man(Len) and a woman(Rin) who are separated when the man leaves her for some reasons. The woman is in love and waits for him but passes away. The man mourns her death and wishs to siGrE “the drizzling rain” to tell her how he is feeling now. Since the original video and lyrics do not tell the detail of the situations they are in, there are many Fanmade PVs with different fan interpretations. Minuit Noel

Minuit Noel

Sung by Rin and Len
Music and lyrics written by twinkle
Music arranged and vocaloid edited by Uta-P
Video here

Alluring Secret ~Black Vow~

Sung by Rin and Len
Music and Lyrics written by Hitoshizuku-P
video here

Harvest

Sung by Rin and Len
Video here

Kagamine hachi-hachi hana no kassen (Hachi-hachi Flowery Battle of Kagamines)

Sung by Rin and Len
video here

South North Story

Sung by Rin(act 1), Rin(act 2) and Len
Music and lyrics by Akuno-P (mothy) and Yunimemo-P
Video here
The song talks about two Rin's, while one is just a normal student the other is probably the Rin from Daughter of Evil.

Sabaku no BLUEBIRD (Bluebird of Desert)

Sung by Rin and Len
Music and lyrics by Akuno-P (mothy)
video here
This is a story of twins, an "elder" brother and "younger" sister, who live in the world where civilization vanished and turned into desert. His dream is doing something big and world-shaking someday. One day they meet a ratty-looking old woman. She tells them that there is a "blue bird" somewhere in the world and it has a power to save the world. The twins set out on a journey to find the "blue bird".

Dai Is-shou: Shin Seiki (Chapter 1: The New Millennium)

Sung by Len
the Elevator Girl voiced by Miku
Music and lyrics written, and video produce composed by Shuujin-P
Video here
In this song, Len plays the role of a young man who is forced to watch the horrors and sadness of the world happened in the past from a glass elevator. Miku Hatsune also appears as the operator of the elevator. He asks her why he's going up, and she replies "There's really not much difference between that and your life." First, he sees a little boy who looks alike to him with a large gun, accompanied by a girl(Rin) and a man (Gakupo), in a poor country in the middle of a war. The country has little to no food or water, and the people in it are suffering and dying. Once again, the young man asks the elevator girl why he can’t go out of the elevator, and she answers " That's the way it goes as with all human lives." Soon after, he sees a man wearing glasses in an industrialized city. The city is rich, successful and seemingly content with their technology. However, accidentally, nuclear missiles are fired at the city. Then, the young man in the elevator clings to the elevator girl's arm, asking her "Why do you keep showing me such suffering things?" and then, she asks back, "There's really not much difference between those and your life, is it?" and this time, she herself takes the form of the young man. Suddenly, the elevator door opens and starts speeding downwards. The one who took form of his keeps the door open for the young man to go out of the elevator. After jumping out of the elevator and falling a long way down, the young man finds himself surrounded by the planets. Wondering to himself why humanity has doomed itself the way it has, he hardens his conviction that suffering and harming each other is not the way humanity should live. His wish then shapes a new peaceful world.
This song is evidently the last song in a 3 part series released later consisting of Utopia, A Ray of Hope and The New Millennium: all of which are composed by Shuujin-P.
The order in which these songs would fall chronologically often confuses fans because the ending of each song is open ended and The New Millennium was released earlier than both Utopia and A Ray of Hope. But, according to the storyline, chronologically , Chapter 2: Utopia is the first episode, Chapter 3: A Ray of Hope is the second and Chapter 1: The New Millennium is the third . The chapters of these songs also do not seem to chronologically fall in order.
Some fans consider the series to be a cycle, where the Len from The New Millennium is similar to the Len that narrates Utopia. There is some evidence that does debunk this: as Utopia’ suggests, Rin and Len are a couple. In A Ray of Hope and The New Millennium, Rin and Len are siblings who are reincarnations of the Rin and Len in Utopia.
Another possibility is that Len from The New Millennium had appeared before the timeline in Utopia due to his actions jumping out of the elevator and changing humanity's past. However, no official information has been released on the real ending and it is left to individual interpretation.

Dai Ni Shou: Risoukyou (Chapter 2: Utopia)

Sung by Rin and Len
Music and lyrics written, and video produce composed by Shuujin-P
video here
Shuujin-P says this is the song of neo-futuristic science fiction. Utopia takes place in the future of Earth, where most of the population is wiped out from nuclear warfare. 50 years before the song's storyline, the United Nations (the meeting led by Kaito) proposed the Humanity Revival Project which was placed into action. It was established that the public believed what makes them human is having a soul, thus they transferred the souls of humans into immortal androids, saying science would overcome all the problems such as hunger and physical pain. In the present storyline, a girl(Rin) is feeling pain since she clashed with a boy and her lover (Len) the day before. But she thinks it would go away soon because both she and he are to be granted the privilege of new bodies of their own next day. Before the procedure, she requests that she wants to be similar-looking as him.
The pair goes through the procedure and the boy meets the girl in her new form. But, as he hears her voice and sees her, he realizes he can’t recognize her as the same person as before the procedure. Their human emotions quickly deteriorate, as they do not feel any pain whatsoever, whether it is physical or emotional. Because of these traits, they do not understand physical sensations such as 'hot' and 'cold', and ideas such as 'love' and 'peace', and they lose sight of what it is like to 'live'. In the end, they lose their identities as 'humans'...
This song links to A Ray of Hope and is part of a 3 part series by Shuujin-P consisting of Utopia, A Ray of Hope and The New Millennium. Chronologically, according to the storyline, Chapter 2:Utopia is the first episode in the series and falls before both Chapter 3: A Ray of Hope and Chapter 1:The New Millennium. Since it was released by the composer as Chapter 2 of the series, this often confuses fans of the song order in which these fall in.
It should also be noted that Rin and Len are introduced into this song as a couple and not siblings.

Dai San Shou: Ichiru no Negai (Chapter 3: A Ray of Hope/ A Faint Wish)

Sung by Rin and Len, the Elevator Girl voiced by Miku
Music and lyrics written, and video produce composed by Shuujin-P
Video here
Picking up where Chapter 2: Utopia leaves off, A Ray of Hope occurs the original Humanity Revival Project was proposed by the United Nations and what happened in the episode of Utopia. Since the 'new humanity', who have android bodies which the people transferred their souls into, do not understand what it is like to have 'pain', they start eliminating those who are not of their kind. This rapidly dwindles the remaining un-android human population and engulfs the world into chaos once more, which is contradictory to what the original project's aim was.
The remaining un-android humans are slaughtered, leaving twins (Rin and Len) as the last two of 'old humanity'. They traverse through the city where the androids infested, to a Transdimensional-Orbital Interface, which would allow them to travel through time to, hopefully, prevent this catastrophe from ever happening. Under attack by the 'new humanity', they activate the device in hurry and they are given visions of their past lives.
The girl(or possibly both of them) realizes that through the ages, regardless of circumstances, they've been together one way or another and it would be heart breaking if they were to lose each other. She decides to not have her brother save her again and shoves him into the Transdimensional-Orbital Interface chamber, quickly shutting the door and locking him in. She then starts up the machine, as he desperately tries to convince her and open the door. She, on the other hand is resolute in being a distraction, as there is not enough time for both of them to escape and dies at the hands of the android (probably this is Android boy from Utopia, who represented by Len), protecting her brother till the chamber is ready. The city is now solely filled with androids with his eliminated sister and he slipping through time through the use of the chamber. At the end, he finds himself in an Elevator, and an Elevator Girl calls out: 「上へ参ります」 ("Ue e mairi masu"), translated as "This elevator goes to the upper floors."
The appearance of the Elevator and the Elevator Girl signals the transition into Chapter 1 :The New Millennium. According to the storyline , it chronologically makes Chapter 1:The New Millennium occur after Chapter 3:A Ray of Hope . Though A Ray of Hope was released by the composer as Chapter 3 of the series, it is the second episode of the series in chronological order. This often confuses fans of the song order in which these fall in.

Falling Falling Snow

sung by Len
video here
A story about the end of a love and the heart-breaking separation.

Proof of Life

Sung by Rin and Len
Music and lyrics written by Hitoshizuku-P
Video here

Soundless Voice

Sung by Len
Music and lyrics written by Hitoshizuku-P
video here
This is the reply song of Proof of Life.

~Synchronicity~ Kimi wo Sagasu Sora (The Sky Where I Look for You )

Sung by Len
Story by Kumagai
Song by Hitoshizuku-P
Art/Video by Suzunosuke
Video here
This is the story of Len searching for Rin who has been chosen as a Diva; a singer who sings to a dragon so that it may bless the country. The only way for a Diva to escape her/his role is to either be killed by the dragon or for another Diva to replace them. This is part one of the planned three songs of the Synchronicity series

~Synchronicity~ Hikari to Kage no Rakuen (Paradise of Light and Shadow)

Sung by Rin and Len
Story by Kumagai
Song by Hitoshizuku-P
Art/Video by Suzunosuke
video here
This is the second part of the Synchronicity series. In this, Len infiltrates the castle and tries to go for Luka, who is a pythoness of the empire, to find his sister Rin. There Meiko, who was nobly born and became a fencer of the empire, attacks Len. However, when she was fighting with Len, he reminds her of her old friend Teto, who sacrificed herself for Meiko and decided to become a Diva, and she goes in with him to save his sister. Len, Meiko, Gakupo and Kaito join together and they go to where the dragon lies and confronts Miku, who is a priestess serving the dragon. The ending of the PV shows Len running towards the distant figure of Rin, hand reaching for her, with happy tears in his eyes. The third installment of the series is yet to come.

nazo ga toke nai nazotoki (the Riddler who can't solve riddles)

Sung by Len
Video here

nazo wo toka nai nazokake

Sung by Rin
video here
Responds to The riddler who can't solve riddlers

Boku ni Piano wo Hikasete / Let Me Play the Piano

Sung by Len
Video here

Me without eyes

Sung by Len
Video here

Paradichlorobenzene

Sung by Len
background vocals by Rin
Music and lyrics written by Owata-P
video here
The song features an animated PV featuring both Len and Rin and computer graphics. The word "Paradichlorobenzene" is repeated constantly throughout the video. There are also frames that flash for less than a second that explain details of the chemical (C6H4Cl2, also known as 1,4-Dichlorobenzene or paradichlorobenzene). On the surface, it seems the word has little to do with the meaning of the song - in fact the lyrics tell that the song and the word have no meaning; “Is there any meaning to this song? There is no meaning to this verse [song]. Is there any sin in this song? There is no sin in this verse [song]. ", " Is there any meaning to ＊＊＊＊[benzene]? There is no meaning to ＊＊＊＊[benzene]. Is there any sin in ＊＊＊＊[benzene]? What this song means is ＊＊＊＊[benzene]." However, Owata-P posted some comments on his blog that the lyrics carry the hidden messages and meanings, and announced there are many clues in the video. He has not elaborated what they really are yet, just saying that interpretations can differ in individuals. [2] One of the interpretations is that Len sings of the tendency for artists whose works are rubbished insensitively or unregarded, and they become jealous of others' work, which they see as better or beloved. As a result, these artists will usually try to erupt in violence and rage against him/herself and others insensitively. The song is the third song of Owata's "Benzene series" (Benzene, Nitrobenzene, and Paradichlorobenzene), and is arguably the most popular in the series. Owata-P states that the previous two songs don't carry any hidden meanings. The song also lasted in the Weekly Vocaloid Rankings for ten consecutive weeks, even scoring the first place spot for two weeks in a row. It later returned after three weeks for another four-week run and is still being ranked.

Antichlorobenzene

Sung by Rin
Video here
Respond to Paradichlorobenzene

Psychotic Len's Love Song (yandelenka)

Sung by Len
By Lelele P
Video here

Borderlands

Sung by Len
by Machigerita
Video here

HAKOBAKO player

Sung by Len and Rin
by AGOANIKI
Video here

falling falling snow

Sung by Len
By U-ta Crow's nest
Video here