History Music / CosMO

* SelfDeprecation: Both Miku and Len's Bousou songs have them addressing [=cosMo=] as something of a pervert with delusions of grandeur (Len even asks straight-out if he thought he was buying an eroge when he bought them!). Also, thehe lines of nonsense kanji that Miku screams in "Hyper∞[=LATiON=]" could also be lampooning how little sense all those high-speed lyrics tend to make.

* LuckyCharmsTitle: "Hyper∞[=LATiON=]", "Capsule" (which is spelled officially as the Greek letter theta), "Sadistic.Music∞Factory", "0", "∞", "ANTI THE ∞ HOLiC", and "Leap from 0→∞".

* {{Gayngst}}: Reincarnated Girl is in love with her best friend, but she knows a relationship between them can never happen because both of them are girls, and [[IncompatibleOrientation one of them is heterosexual]]. Her Garden involves "resolving" this issue by {{Gender Flip}}ping her, but she slowly realizes that her ''real'' self would never get the attention she's getting in this fake world.

[=cosMo=] has produced three series--the ''Fantastic Garden'' series, its sequel ''The Star Girl and the Illusion Paradise'', and ''The Disappearance of Hatsune Miku,'' which is responsible for his leap to fame. He has produced a number of mini-albums, and his songs are often included in Miku compilation [=CDs=]. ''Fantastic Garden'' is known for being extremely surrealist, and ''The Disappearance of Hatsune Miku'' chronicles the experience of what life is like for an actual Vocaloid program with a merciless eye. The ''Disappearance'' series, along with a few new songs, has been released as a full-length CD which will also be [=cosMo=]'s major debut. The album has also spawned a light novel written by cosMo himself in 2013. [=cosMo=] has also provided theme songs for some of Miku's concerts, most notably Magical Mirai 2021.

* ArcSymbol: The infinity symbol pops up a lot in both the ''Disappearance'' series (where it's most seen) and in the ''Star Girl/Fantastic Garden'' series. Stars also pop up a lot in the ''Star Girl'' series (fittingly enough), representing the star mascot of Dr. Realist.

* CanonWelding: The Fantastic Garden is mentioned in "Hyper∞[=LATiON=]", implying it's where Miku went after her death in "Disappearance". Also, the writer in ''Fantastic Garden,'' who originally had a cameo in "Runaway Boy", turns out to be another real resident of Stella. Stella herself was the singer of a one-shot song, but then popped up again in the ''Star Girl'' series as one of the masterminds behind it.

* EvilCounterpart: The "Lost/Train" Girl and "Sister/Idol" Girl from the ''Illusion Paradise'' series become this to Rho and Lambda in "Monochrome Voice", attempting to brainwash the masses and getting into a fight with the pair. The song's subtitle "Anti the "FAKE" HOLIC" makes it even more apparent.

** And then ''yet again'' in ''VideoGame/HatsuneMikuColorfulStage'', with "Disappearance" and "Intense Voice" taking up the spots as the hardest songs in the game at all difficulty settings in the early game.
* TheGadfly: The protagonist of ''R.I.P. in the Gossip Sea'' is enamored by gossip, believing it to be more addictive than music.

* MindScrew: Fans are already whacking their brains out which came first: ''Radio Girl and the Fantastic Garden'', or the Fantastic Garden series. Or that either are just very coincidentally the same. As of the release of "Story x Teller", it looks as if Radio Girl and the Fantastic Garden girl are twins.

** "Intense Song" is the [=INFiNITY=] Happy End--both songs involve Miku finally accepting her fate as a Vocaloid.

* RefugeInAudacity: Capsule is about an entire kingdom that's falling into ruin because all the adults spend their days in a drugged haze, from the perspective of a little girl who only manages to find happiness by [[MushroomSamba joining them in the pill-popping action]].

* SplitPersonality : In "The Division → Destruction of Hatsune Miku", Miku's Append voicebanks is portrayed as "shadows" of the original Miku, with Sweet particularly telling her to forget everything.

* Story x Teller[[note]]Written for the novelization of the Fantastic Garden series[[/note]]

* [[VideoGame/ProjectSekai Imaginary Friend]]
* [[VideoGame/ProjectSekai Machine Gun Poem Doll]]
* [[VideoGame/ProjectSekai Yaminabe!!!!]] (winning entry for the Proseka ULTIMATE contest)

** And then ''yet again'' in ''VideoGame/ProjectSekai'', with "Disappearance" and "Intense Voice" taking up the spots as the hardest songs in the game at all difficulty settings in the early game.

* NintendoHard: cosMo's songs has an infamous reputation for being exceptionally hard, even for rhythm game veterans. "Machine Gun Poem Doll" for ''VideoGame/ProjectSekai'' even came with a message from him ''taunting'' the players. He then does it ''again'' for his winning entry for the Proseka ULTIMATE contest, "Yaminabe!!!!", which has the added condition of having the note speed adjust to the song's BPM on the hardest difficulty.

* {{Bokukko}}: Miku. The ''Disappearance'' series explains that [[spoiler:this is the pronoun of choice for all Vocaloids because "boku" is a homonym for the abbreviation VOC. in Japanese]].

* I Sing [[written as an insert song for the novelization of "The Disappearance of Hatsune Miku"]]

* CanonWelding: The Fantastic Garden is mentioned in "Hyper&#8734[=LATiON=], implying it's where Miku went after her death in "Disappearance". Also, the writer in ''Fantastic Garden,'' who originally had a cameo in "Runaway Boy", turns out to be another real resident of Stella. Stella herself was the singer of a one-shot song, but then popped up again in the ''Star Girl'' series as one of the masterminds behind it.

* LaughingMad: Miku in her horribly ressurrected form in "Hyper∔[=LATiON=]". Len also has a stint of laughing crazily while on his stress-induced road roller rampage in "Kagamine Len no Bousou".

* SplitPersonality : In "The Division → Destruction of Hatsune Miku", Miku's Append voicebanks is portrayed as "shadows" of the original Miku, with Sweet particularly telling her to forget everything.

* New World

* [[BSODSong The Division-->Destruction of Hatsune Miku]]

* Hyper&#8734[=LATiON=]

* Yellowbrick Milestone
* Bounce from 0→∞
* Shuuten

* Miku, Piano, and Fantasy

* Miyako Wasure

* At the Old Capital of Ateliesta

* Solitary Confinement, Stellar Theater (Luka; not an official part of the series, but was Stella's debut as a character)
* The Star Girl and the Illusion Paradise (Luka)
* [[https://www.youtube.com/watch?v=Ov8W-5r1po0&feature=related The Runaway Boy and The Lost Girl]] (Gumi)
* [[https://www.youtube.com/watch?v=UjQkKf9DpTo The Nun and the Idol Girl]] (Miku)
* [[https://www.youtube.com/watch?v=hzIQ7fGin9s&feature=relmfu The Childish Girl and the Grown-Up World]] (Gumi)

* [[https://www.youtube.com/watch?v=vwFFrHJFheY&feature=related Dr. Realist]] (Gakupo)
* [[https://www.youtube.com/watch?v=d4jb8OfgV0o&feature=channel&list=UL The Adventurous Girl and The Miniature Garden Game]] (Miku)
* [[https://www.youtube.com/watch?v=3LHuE08NzDk&feature=related The Radio Girl and the Fantastic Garden]] (Miku)
* [[https://www.youtube.com/watch?v=7AblJsys3m4&feature=related The Reincarnated Girl and The Reincarnated Boy]] (Rin and Len)
* The A.I. Girl and her Deep-Sea Heart (Everyone)

* [[https://www.youtube.com/watch?v=-cyR_pR4_j0&feature=related Another Lost Girl]] (Extra)

** The ''VideoGame/HatsuneMikuProjectDIVA'' games ''love'' setting cosMo songs as these. The first game kicked it off with ''The Disappearance of Hatsune Miku'' as its FinalBoss. Then its sister song ''The Intense Voice of Hatsune Miku'' ejected ''Disappearance'' from its position in the second game and its UpdatedRerelease ([[NintendoHard and this version of the song remains one of the hardest songs in the series]]). ''F'' threw in the original song ''Sadistic.Music∞Factory'' as its FinalBoss. ''F 2nd'' finally broke the trend by [[{{Nerf}} nerfing]] ''Intense Voice'' and setting the FinalBoss to ''2D Dream Fever''. ''X'' then brings this back in full force with ''The Ultimate Medley'', which is not only remixed by him, but is a literal BossRush of [[ThatOneBoss the most dreaded songs in the franchise]], which include all of the aforementioned tracks.

** And then ''yet again'' in ''VideoGame/ProjectSekai'', with "Disappearance" and "Intense Voice" taking up the spots as the hardest songs in the game at all difficulty settings in the early game. [[TrollingCreator And since [=cosMo=] is never satisfied,]] his following songs to arrive to the game ("Machine Gun Poem Doll" and "Yaminabe") both end up breaking the difficulty scales even further.

* LuckyCharmsTitle: "Hyper∞[=LATiON=]", "Capsule" (which is spelled officially as the Greek letter theta), and "Sadistic.Music∞Factory".
* MindScrew: Fans are already whacking their brains out which came first: ''Radio Girl and the Fantastic Garden'', or the Fantastic Garden series. Or that either are just very coincidentally the same. Or that it's a result of [[CanonWelding cosMo simply wanting to]] [[TrollingCreator screw with us.]] As of the release of "Story x Teller", it looks as if Radio Girl and the Fantastic Garden girl are twins.

* MultipleEndings: The ''Disappearance'' series has a few:

** "∞" is the True End, and "Intense Song" is the [=INFiNITY=] Happy End--both songs involve Miku finally accepting her fate as a Vocaloid.
* NintendoHard: Almost every song he makes that makes it into a rhythm game is explicitly designed to make players suffer as much as possible. "Machine Gun Poem Doll" for ''VideoGame/ProjectSekai'' even came with a message from him ''taunting'' the players. He then does it ''again'' for his winning entry for the Proseka ULTIMATE contest, "Yaminabe!!!!", which has the added condition of having the note speed adjust to the song's BPM on the hardest difficulty.
* RefugeInAudacity: Capsule is about an entire kingdom that's falling into ruin because all the adults spend their days in a drugged haze, from the perspective of a little girl who only manages to find happiness by [[MushroomSamba joining them in the pill-popping action]]. There aren't many media where you can get away with stories like this, let alone have them become popular.

* [[SpiritualSuccessor Spiritual Successor]]/[[SpiritualAntithesis Spiritual Antithesis]]: "Hatsune Creation Myth" can be seen as one to "Intense Singing" (in the former case) ''and'' "Disappearance" (in the latter), particularly in how Miku sings about all the things Vocaloids have done to help people since her inception - thus nullifying the threat of "disappearance" she was faced with from the original song. It helps that the meter for the MotorMouth section in "Creation Myth" is the ''exact same'' as the ones in "Disappearance".

* TakeThatMe: Both Miku and Len's Bousou songs have them addressing [=cosMo=] as something of a pervert with delusions of grandeur (Len even asks straight-out if he thought he was buying an eroge when he bought them!). The lines of nonsense kanji that Miku screams in "Hyper∞[LATiON]" could also be lampooning how little sense all those high-speed lyrics tend to make.

* AlternateCharacterReading: "Anti The Fantastic Garden" is spelled with the kanji for "The Girl's Fantastic Garden" in reverse. Often abused in ''Disappearance'' songs' lyrics.
* AntiVillain: Dr. Realist, Type IV, in his own song, as he simply aims to free the inhabitants of the Illusionary Theater from Fantasy to Reality. The results are ... one trip short into disaster.
* AntiEscapismAesop: The ''Star Girl'' and ''Fantastic Garden'' series have heavy themes against escapism, as most of the girls that come into contact with the Garden are escaping something or other from their real lives, and when they remember what that was they all fall into despair. The only person who enters the Garden and doesn't do this is Radio Girl, [[PlayingWith but]] she's also the only girl to end her song happier than when she started out.
* AnachronicOrder: On the ''Disappearance'' CD, "Zero" is track 8, and is presented as Miku remembering her own first startup.
* ArcSymbol: The infinity symbol pops up a lot in both the ''Disappearance'' series (where it's most seen) and in the ''Star Girl/Fantastic Garden'' series.
* AxCrazy: The resurrected virus-infected Miku in "Hyper∞lation".

* BSODSong: You could say that this is a specialty of his...
* BodyHorror: The creation of Append is described as some unholy mix of rape and vivisection.

* ButtMonkey: Len has it rough in ''Magical Nuko Len Len" and his "Bousou" parody. His producer is a pervert, he keeps getting stuck in lewd and embarrassing clothing, and when he gets to sing it's either about said embarrassment or being forced to sing lewd things.

* CameBackWrong: Miku in "Hyper∞lation" [[DamagedSoul isn't quite]] [[AxCrazy the same anymore...]]
* CanonWelding: In one of the bad endings Miku imagines to "Disappearance", she winds up in the Fantastic Garden. The writer in ''Fantastic Garden,'' who originally had a cameo in "Runaway Boy", turns out to be another real resident of Stella. Stella herself was the singer of a one-shot song, but then popped up again in the ''Star Girl'' series as one of the masterminds behind it.

* CreatorCameo: cosMo himself voices Gonbuto in "Magical Nuko Len Len".

* DeathByCameo: "Runaway Boy and the Lost Girl" features short cameos by the Fantastic Garden writer, Rin and Len from "Atriesta", the girl from "R-18", and Lucy (A.K.A Shii-tan, the little girl from "Capsule"). Lucy is sitting on top of a skyscraper. She's so enamored by her drug-induced hallucinations that she falls off.

** And then ''yet again'' in ''VideoGame/ProjectSekai'', with Disappearance and Intense Voice taking up the spots as the hardest songs in the game at all difficulty settings.

* LaughingMad: Miku in her horribly ressurrected form in "Hyper∔Lation". Len also has a stint of laughing crazily while on his stress-induced road roller rampage in "Kagamine Len no Bousou".
* LastNoteNightmare: "Demise" and "Runaway Boy and the Lost Girl".
* LuckyCharmsTitle: "Hyper∞lation", "Capsule" (which is spelled officially as the Greek letter theta), and "Sadistic.Music∞Factory".
* MindScrew: Fans are already whacking their brains out which came first: ''Radio Girl and the Fantastic Garden'', or the Fantastic Garden series. Or that either are just very coincidentally the same. Or that it's a result of [[CanonWelding cosMo simply wanting to]] [[TrollingCreator screw with us.]]

** "Disappearance" is the Dead End, in which Miku is deleted. "Hyper∞lation" serves as this end's sequel, but things manage to [[FromBadToWorse get worse for her]] as she is [[CameBackWrong horribly resurrected]].

* NintendoHard: Almost every song he makes that makes it into a rhythm game is explicitly designed to make players suffer as much as possible. "Machine Gun Poem Doll" for ''VideoGame/ProjectSekai'' even came with a message from him ''taunting'' the players. He then does it ''again'' for his winning entry for the Proseka ULTIMATE contest, "Yaminabe!!!!".

* TakeThatMe: Both Miku and Len's Bousou songs have them addressing [=cosMo=] as something of a pervert with delusions of grandeur (Len even asks straight-out if he thought he was buying an eroge when he bought them!). The lines of nonsense kanji that Miku screams in "Hyper∞lation" could also be lampooning how little sense all those high-speed lyrics tend to make.

* VillainSong: ''Dr. Realist''

[=cosMo=], also called Bousou-P after one of his more popular works, is an animator and prominent Music/{{Vocaloid}} composer. He has become famous in the Vocaloid community for producing a vast number of extremely fast-tempo songs (often over 200 bpm), pushing the software to its limits. He has composed music sung by Music/HatsuneMiku, Kagamine Rin and Len, Megurine Luka, Gumi, and Gakupo; while most of [=cosMo=]'s works are Miku songs, he claims that his favorite Vocaloid is Kagamine Len.

[=cosMo=] has produced three series--the ''Fantastic Garden'' series, its sequel ''The Star Girl and the Illusion Paradise'', and ''The Disappearance of Hatsune Miku,'' which is responsible for his leap to fame. He has produced a number of mini-albums, and his songs are often included in Miku compilation [=CDs=]. ''Fantastic Garden'' is known for being extremely surrealist, and ''The Disappearance of Hatsune Miku'' chronicles the experience of what life is like for an actual Vocaloid program with a merciless eye. The ''Disappearance'' series, along with a few new songs, has been released as a full-length CD which will also be [=cosMo=]'s major debut. The album has also spawned a light novel written by cosMo himself in 2013.

!The ''Disappearance'' series includes:

* [[BSODSong The Division-->Crash of Hatsune Miku]]

* The Demise of Hatsune Miku
* The Disappearance of Hatsune Miku
* Hyper(INF)lation
* ∞ (The Resurrection of Hatsune Miku)
* [[EarnYourHappyEnding The Intense Voice of Hatsune Miku]]

!The ''Fantastic Garden'' series includes:

* Magical Girl Radical Paint
* Anti-The Fantastic Garden

* At the Old Capital of Atriesta

!The ''Star Girl and the Illusion Paradise'' series includes:

!Other songs, remixes and covers:

* Song Box (one version each for Miku, the Kagamines, and Luka)
* Dennou Skill
* Packaged (cover)
* Meltdown -Hard RK Mix- (cover)
* Just Be Friends -Hard RK Mix- (cover)
* R-18
** R-25 (self-cover)
* Dokubou Stellar Theater
* Magical Kitty Len Len
* Dystopia Jipangu
* Rainbow Adventure NTG Remake (cover)
* The Rampage of Kagamine Len (a spoof of "The Rampage of Hatsune Miku")
* Melt -Soft LM Mix- (cover)

* Escape from Dystopia

* The Real Disappearance of Hatsune Miku
* R.I.P. in the Gossip Sea

* Hatsune Creation Myth

* Yaminabe!!!!

* AxCrazy: The resurrected virus!Miku in "Hyper∞lation".

* ConceptAlbum

* DeathByCameo: "Runaway Boy and the Lost Girl" features short cameos by the Fantastic Garden writer, Rin and Len from "Atriesta", the girl from "R-18", and Lucy (A.K.A Shii-tan,the little girl from "Capsule"). Lucy is sitting on top of a skyscraper. She's so enamored by her drug-induced hallucinations that she falls off.
* DownerEnding: Doesn't the last few seconds of "The Adventurer Girl and the Playground of Eden" sound familiar? [[spoiler: That's right. It's her own electro-cardiogram.]] "The AI Girl and Her Deep-Sea Heart" confirms [[spoiler:her death]], as Miku sings about not being able to think while dying while an image of the character lying still in the hospital gown she wore at the end of "Adventurer Girl's" PV appears on screen.

* LastNoteNightmare: "Demise" and "Runaway Boy and the Lost Girl"
* LuckyCharmsTitle: Hyper∞lation, Capsule, Sadistic.Music∞Factory.

** "∞" is the True End, and "Intense Song" is the [=INFiNTY=] Happy End--both songs involve Miku finally accepting her fate as a Vocaloid.
* NintendoHard: Almost every song he makes that makes it into a rhythm game is explicitly designed to make players suffer as much as possible. "Machine Gun Poem Doll" for ''VideoGame/ProjectSekai'' even came with a message from him ''taunting'' the players.

** "Real Disappearance'"is this towards Vocaloid fans who only care about the Vocaloid singing the music they listen to, not the producer behind it.
* TakeThatMe: Both Miku and Len's Bousou songs have them addressing [=cosMo=] as something of a pervert with delusions of grandeur (Len even asks straight-out if he thought he was buying an eroge when he bought them!). The lines of nonsense kanji that Miku screams in Hyper∞lation could also be lampooning how little sense all those high-speed lyrics tend to make.
* {{Tsundere}}: Rin.

* IllGirl: Adventurous Girl.

* DarkerAndEdgier: The Cinematic Version of "The Disappearance of Hatsune Miku" created for VideoGame/TaikoNoTatsujin is ''much'' darker than its original version, taking a more horror-themed interpretation of Miku's deletion.

* {{Gayngst}}: Reincarnated Girl is in love with her best friend, but she knows a relationship between them can never happen because both of them are girls, and [[IncompatibleOrientation one of them is heterosexual]]. Her Garden involves "resolving" this issue by {{Gender Flip}}ing her, but she slowly realizes that her ''real'' self would never get the attention she's getting in this fake world.

** ''Dr. Realist'', meet Radio Girl. It's implied at the end of the song that her attitude towards Dr. Realist is a ''bad'' thing, however, since [[spoiler:He's really trying to help the residents of the Fantastic Garden (in his own weird way) and she wholesale rejected him. He's more annoyed than anything after the ordeal]].
** ''Real Disappearance'' is this towards Vocaloid fans who only care about the Vocaloid singing the music they listen to, not the producer behind it.

** Not to mention the album artwork for "Hyper∞LATiON", which shows Miku's body full of ''holes.''

* EarnYourHappyEnding

* TakeThat:

* SurprisinglyRealisticOutcome : "The Real Disappearance of Hatsune Miku" rather bluntly describes how Hatsune Miku would die in real life: she would lose her charm and be forgotten, and the world will move on to the next fun thing, much as it had done in the past.