Aimi Yoshikawa works as a new sales representative selling office equipment door-to-door. Six months after joining the company, she gradually earns the trust of clients and her superiors—until a sudden incident changes her life forever. Her father falls critically ill, and the burden of medical expenses becomes overwhelming, pushing Aimi to the edge mentally and emotionally. One day, while visiting a client, she sees the customer leave his wallet carelessly on the table as he heads to the bathroom. Unable to resist, Aimi reaches for it. Unseen by her, the client's son—referred to as "I"—witnesses the act. With no way to seek help or escape, Aimi is slowly cornered, drawn into the worst kind of pleasure, and led into a brutal POV rape training. As the ordeal progresses, the darkness within Aimi's heart grows deeper.