Age 12

Summer Love (1x11)

:

After accidentally hitting Yui on the head with a football during the gym lesson, Kazuma invites her to a pool date as an apology and they invite Hanabi and Yuuto. However, Eikou and his pranksters overhear the girl's conversation and on the day of the pool date, they keep spoiling the couples' time and mood, so it's up to Kazuma to chase them away.