Summer classes drag on in a sweltering classroom where the air conditioning barely works. Convinced that remedial lessons are pointless, I hide out on a bed in the nurse's office. Only Ayaka refuses to give up on me, and as she continues looking after me, she becomes more than just my teacher. In this adult teacher-student role-play, we cross the line and spend the summer break alone, sweating as we give in to each other. But our happy time together cannot last forever...