A novice actress, Miku have been appointed the leading role in a play written by a legendary writer. During the play, she bizarrely found herself in the world described in the play—the world has the same setting as what's written in the script, a mansion and 7 inhabitants. For the sake of escaping back to reality, Miku and the inhabitants have to search for a stolen page from the script...

Bad∞End∞Night: Insane Party is based on the "NighT ∞ Series" consisting of four Vocaloid songs composed by Hitoshizuku-P. The series was published in English as Hatsune Miku: Bad∞End∞Night by Seven Seas Entertainment from May 2 to October 24, 2017.