She is a high school student who attends Kanagawa Prefecture Public Dusk Academy. After a dispute with a close friend Yamanashi and having left by train, she ends up in a strange place full of non-human beings and demons, she will have to cross that place on her own. and only with a spiked bat as her only defense, apart from her cunning. She does not give up so easily, it seems that she is always fighting for her life and her mental stability, she will not hesitate to fight for anything.