Office worker Ria ends up sharing a room at a hot-spring inn with the boss she hates. He drugs her with sleeping pills, films her, then blackmails her and fucks her. In a room with a broken air conditioner his sweaty, relentless thrusting lasts until morning; he cums two, three times and still does not stop, telling her her boyfriend cannot satisfy her, until her body arches and she cums over and over.