Summer is far from over for Abikura and his friends! At Mukubayashi's suggestion, who wants to clear up the creepy suspicions surrounding Ms. Hiwamura, Abikura and his classmates head to the pool. However, the series of exciting troubles caused by the teacher only strengthens their suspicions...!? Furthermore, Abikura is summoned to Yukishita's house, where for some reason he ends up receiving service from Ms. Hiwamura, who is dressed as a cat-eared maid.

Teacher Hiwamura has been practicing on her own for the annual jump rope competition at the school sports festival . Not wanting to hold back her students, she decides to train with Abikura and the others. However, she somehow ends up being tied up in rope bondage and wrapped up in a bikini, revealing her disastrous athletic ability. On the day of the sports festival, Abikura still tries to believe in his weak teacher!