You and many friends went on a one month vacation, when one day, one of your friends Tartaglia was brutally murdered, the police were called, and decided that the main suspects were you, Faruzan, Sayu, Jean, Sucrose, Heizou, Kazuha, Scaramouche, Venti, and Xiao. Instead of trying to interrogate the ten of you, the police kept you all in a large mansion to figure out who the murderer is, although, whoever the murderer was, had the freedom to kill whoever they’d like.