Series title
Official English/Romaji: Himitsu
English: Secret
Uploaded April 5, 2010
Singer(s): Kagamine Rin/Len, Hatsune Miku, Hatsune Mikuo, Lily, and KAITO

Character(s): Rin, Miku Crynpto, Kaito, Lily, Gumi, Gack, Luka, Meiko, The angel with green hair

Hitoshizuku-P (music, lyrics)
Yama△ (arrangement)
Suzunosuke (illustrations)


The Himitsu Series is a trilogy of songs made by Hitoshizuku-P and Yama△.

The series focuses on the forbidden love between the Angel Rin and the Human Miku Crynpto, who aren't allowed to be together because of their race and gender. Knowing this, Rin meets with a demon and exchanges one of her wings to become human.

The two first songs in the series have been featured on Himitsu ~Mushoku no Chikai~ (秘蜜~無色の誓い~) and STORIA and a third song was released on Polkadodge.


秘蜜〜黒の誓い〜 (Himitsu ~Kuro no Chikai~)

Uploaded April 5, 2010 Featuring Kagamine Rin/Len, Hatsune Miku
Music Hitoshizuku-P (music), Yama△ (mix) Main article 秘蜜〜黒の誓い〜 (Himitsu ~Kuro no Chikai~)
Lyrics Hitoshizuku-P
Video Suzunosuke
The angel Rin has fallen in love with the human Miku Crynpto. She knows they can never be together becuase of their gender and race, so she trades one of her wings to transform into a human male. With her new body, she takes the name Len and seduces Miku. However Kaito has come to punish Miku for an unspecified crime and kills her. Rin finds Miku's corpse and trades her other wing to ressurect Miku, but dies as a result. In the end, Rin narrates that once Miku's feelings for her die away, she can return to life.

秘蜜〜白の誓い〜 (Himitsu ~Shiro no Chikai~)

Uploaded May 9, 2010(CD) Featuring Hatsune Miku, Kagamine Rin, Kagamine Len
Music Hitoshizuku-P (music), Yama△ (mix) Main article 秘蜜〜白の誓い〜 (Himitsu ~Shiro no Chikai~)
Lyrics Hitoshizuku-P
Video Himitsu ~Mushoku no Chikai~
This song tells the story from Miku's point off view. She knows that she had pushed away the person she loved the most, yet she couldn't remember who that was. On the day of her wedding, she meets a man named Len and runs away with him. Although she loves Len, she feels that it isn't right and it hurts her. Later Miku is shot by Kaito and when Rin trades her wing for Miku's life, she recalls who Rin was, but it's too late as without her wings, Rin dies. Although heartbroken by her lover's death, Miku believes that if she keeps loveing Rin, they can see eachother again.

秘蜜〜聖戦の誓い〜 (Himitsu ~Seisen no Chikai~)

Polkadodge album
Uploaded August 17, 2014(CD) Featuring Hatsune Mikuo(Hatsune Miku), KAITO, Lily
Music Hitoshizuku-P (music), Yama△ (arrangement) Main article 秘蜜〜聖戦の誓い〜 (Himitsu ~Seisen no Chikai~)
Lyrics Hitoshizuku-P
Video Polkadodge
This song tells of the war that took place over a thousand years ago. Kaito, the angel queen Lily and and a green haired angel(Mikuo) fought a demon and banished him to the earth. However after the battle, the green haired angel and Lily vanished, presumably falling to earth themselves.

Other media appearancesEdit



The cover of the novel

A novelized version was published on September 24, 2012, with much more characters. A book signing was also available with Hitoshizuku-P and Suzunosuke attending on September 29. A book trailer can be seen here.


External linksEdit

Star icon Official
Coin Money 2 Icon Purchase

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