Shiho Amatsuka and Reira Kuronaga are inseparable track club members chasing the same dream. After a serious leg injury forces Shiho to retire and become the team manager, a new advisor named Inose (with a terrible reputation) enters their lives. He blackmails them with compromising evidence of Reira, forcing Shiho to agree to humiliating conditions including wearing a remote clitoral vibrator to school daily and sending proof photos to protect her friend. The episode dives into intense submission, teasing, and sexual coercion as Shiho tries to endure while planning to gather evidence against him.