​When the Kameyama and Otori families, who are related, find themselves vying for control over Otori Academy, a series of violent crimes begin to plague the school. Whispers spread of a mysterious figure wearing an iron mask, preying on female students within the campus. Senna falls victim to the assault of sinister tentacles and is subsequently raped by a demon. As Mao encounters the man in the iron mask, her attempts to fight back prove futile, only to be rescued by Hitomi Kameyama. Brace yourself as this shocking tale unravels, promising more horrifying twists and turns for everyone involved.​