New employee Aono stays at a hotel while on a business trip with her disliked department head. She drinks the room's beverage, unaware that it's laced with an aphrodisiac… and, tempted by the drug, she experiences a mental breakdown and reaches orgasm. Late at night, she is repeatedly raped, drooling, sweating profusely, and moaning incessantly. As the intense sex escalates, she is penetrated multiple times by the department head's penis, gradually becoming his sex slave… The aphrodisiac is far too potent for a new employee.