possession

An anxious student discovers his teacher has been secretly sharing intimate moments with three unknown men in the student council room, sparking a heated rivalry over a forbidden bond with his sister Masaru. He confesses his jealousy and desire, insisting he cannot bear to see anyone else near her as the tension escalates around their conflicting emotions. The climax erupts into an intense, body‑focused encounter where possession and genuine affection blur, leaving the characters trapped in a painful, sensual struggle.