Shin Seiki Inma Seiden

The Kameyama and Otori families, who are related, are engaged in a rivalry for control of Otori Academy. A series of violent incidents occurs at the school, with rumors circulating of a perpetrator in an iron mask assaulting female students. Senna is assaulted by writing tentacles and raped by a demonic entity. The iron-masked man later confronts Mao; her attempts to fight him prove futile until Hitomi Kameyama intervenes to rescue her. Further horrifying events continue to unfold.