Regret Message

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"Regret Message", the third of the series to be released (uploaded May 25, 2008), tells of Riliane's feelings directly after "Servant of Evil", related to the plot story which Akuno-P posted on his blog. Riliane realizes that it had been her own selfishness that had killed her brother, and the wish she made was apparently also the Servant's wish before he died. The official English title of the song is "Fallen angel". Akuno-P gave key words to this song;「君が教えてくれた、ひそかな言い伝え」("A secret legend that you told me").

Though "Regret Message" has not been officially taken in the any of the series for a long time as the author has not confirmed it, a lot of fans have initially believed it is in the "Daughter of Evil" series. They also often regarded "Re_birthday" as a part of the Story of Evil. Also in the original video of the song has some clues that seem to imply the relation. Later, the song "Daughter of White" and a promo of the novel "Daughter of Evil, Clôture of Yellow", along the release of the album 悪ノ王国 ～Evils Kingdom～ showed the connection of "Regret Message" with the series.

Singing Roles
Rin Kagamine as Riliane Lucifen d'Autriche

Non-Singing Roles
Len Kagamine as Allen Avadonia