Shiho Amatsuka and Reira Kuronaga, both members of the track and field club, have always been there for each other—running side by side, chasing the same dream. But during an important competition, Shiho suffers a serious injury to her right leg and falls into deep despair. With Reira’s unwavering support, she eventually makes the painful decision to stop running and instead takes on the role of team manager.
When their third year begins, a new advisor named Inose joins the club and completely changes its atmosphere. Despite his awful reputation among the girls, he starts frequently calling Shiho into his office. About a month earlier, Inose had shown Shiho “evidence” that Reira had been sleeping with men.
Desperate to help her friend, Shiho tries to negotiate with the advisor to get Reira’s punishment lifted. They come to an agreement with three strict conditions:
- Every morning on her way to school, Shiho must wear a clitoral vibrator and send him a clear photo proving she has it on.
- For the agreed period, she must obey any instruction he gives without question and is not allowed to remove the device herself.
- Any sexual contact or kissing between them is absolutely forbidden. If the advisor breaks this rule, he agrees to face serious social and professional consequences.
At first, Shiho plans to play along and act obedient while secretly collecting evidence to expose Inose after the final competition is over. But then...
