Ep. 10: Ono Island Summer Festival events and personal interactions unfold among the team members.
During the Ono Island Summer Festival, Maaya confronts Kaname and Amuro, demanding Kaname spend time with her. Kaname refuses due to past bullying, which Maaya misinterprets as an insult regarding her bust size, causing her to leave. Makio finds Maaya, sharing her own insecurities about her small bust and proposing a secret technique to increase it, leading them to the ladies' room to question Shizuoka. Meanwhile, the team gathers at Ikamasa’s rigged fishing booth, except for Amuro. Kaname enters a watermelon eating contest against Amuro and her father, with the loser facing a dunk tank penalty. The post-script follows male swimmers Takeda, Tsunime, and Jun as they attempt to meet cute girls at the festival, encountering unexpected results.
Episodes
- Ep. 6 · Maaya Nanako manipulates the swim team and boys to build a private changing room.
- Ep. 7 · The team searches for Amuro's lost lucky X charm before the swim tournament.
- Ep. 8 · Orizuka faces rival Nanjou Karena while the boys sneak into the girls' club room for mahjong and exploration.
- Ep. 9 · Orizuka seeks budget approval while Sanae and Orizuka share conflicting swim team origin stories.
- Ep. 10 · Ono Island Summer Festival events and personal interactions unfold among the team members.
- Ep. 11 · Umishou and Shinomiya teams face a hot spring challenge before the Kantou tournament preliminaries
- Ep. 12 · The Tamatsuka Quadruplets and the Medley Relay Crisis
- Ep. 13 · Amuro's Mermaid Victory and the Inter-High Qualification