Kotaro and the boys go to the beach for a day of fun while Puniru and Kirara-senpai are at the school pool. Later, Kotaro asks Puniru to help him cool off with a special transformation, the gang hits a café, and then it's time to tackle summer homework.

Kotaro wants to be cool and decides to try his luck with dragons and a rock band. Puniru then lets the cat out of the bag about Kotaro's feelings for Kirara, which forces him to make a move. Can he get Puniru to help him out?