12-sai.: Chicchana Mune no Tokimeki episode 11

It aired on Monday, 13 June 2016.

Summer Love

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.