As the related Kameyama and Otori families battle to lead Otori Academy, sinister goings-on complicate their internal struggle. Terrifying sexual acts are taking place, with the assailant concealing his identity with a foreboding iron mask. In these episodes, Senna is attacked by tentacles and a demon, and then the masked man appears before Mao, who tries to fight him off. When she fails to succeed, Hitomi Kameyama comes to her rescue, but the horror has just begun.