In her first year class, a classmate named Yutaka becomes overly friendly towards Tooru, which bothers her a bit. Meanwhile, a new health teacher, Mr. Satō, becomes attracted towards Run due to her forehead, which naturally bothers Tooru. It is later revealed that Satō is physically weak himself. As Yutaka becomes increasingly clingy to Tooru, her friend Miho tries to keep her in check, though this admittedly makes Tooru feel lonely.

As the students clean the school up, Miho gets to know Tooru, much to Yutaka's chagrin, while the other girls have some fun cleaning the pool. Later, Nagi becomes concerned that she's gaining weight and goes on a diet, but is later convinced that she shouldn't force herself to do so.