kokoro has been dating a third-year boyfriend while secretly harboring feelings for kaoru yuki, a member of the same baseball team. she starts her managerial duties amidst this. one summer day, after practice, kokoro is cleaning the roof alone when suddenly caught in a torrential downpour. the door from the roof to the school building is locked. reluctantly, kokoro enters the clubroom, only to find herself unexpectedly alone with kaoru. with weak cell phone signals making outside contact difficult, the two find themselves trapped in a cramped space, their bodies pressed together in the uncomfortable humidity.