Board Thread:Roleplay/@comment-24947676-20160309133933/@comment-24947676-20160312073321

(More like those FOUR vocaloid songs. They're a quartet of songs. Bad End Night, Crazy Night ~The Lost Libretto~, Twilight Night, and Everlasting Night. Everlasting Night details the events of the novel, which happens to be the canon source for all info about the series of songs. It involves time travel.)