Amatsuka Shiho and Kuranaga Reira, stalwart members of the school’s athletics club, had long shared a bond forged in mutual support and shared ideals. However, during a pivotal competition, Shiho’s world shattered when she suffered a devastating leg injury, plunging her into despair.

With Reira’s unwavering encouragement, Shiho made the difficult decision to step down from athletic competition and assume the role of team manager. Little did she know that her life was about to take an even darker turn.

In the third year, the arrival of the new advisor, Inose, brought a radical shift to the club’s atmosphere. Reputably a pariah among students, Shiho found herself inexplicably summoned to Inose’s office on a regular basis.

A month prior, Inose had presented Shiho with irrefutable evidence of Reira’s alleged “impure sexual relations” with members of the opposite sex. Consumed by a mix of shock, betrayal, and a desperate need to clear Reira’s name, Shiho turned to the advisor for guidance.

In a Faustian bargain, Shiho agreed to meet Inose’s three degrading conditions in exchange for the promise of sanctions against Reira:

1. Each morning, Shiho must attach a suction cup to her clitoris and send explicit photos as proof of compliance.
2. She must prioritize Inose’s every command and not resist or remove the device during the designated period.
3. Shiho is forbidden from engaging in sexual activities, including kissing, with anyone, lest Inose face social consequences.

Shiho’s plan was to feign obedience, secretly gathering evidence to bring down her tormentor once the final competition concluded. But as the days passed, the humiliation and depravity of her situation began to erode her resolve, leaving her trapped in a web of obscenity and despair.