To celebrate the completion of the national competition, Taiki and his friends go on a trip to the sea.
Nearby, the girls' basketball team led by Chinatsu is also having a summer training camp! For some reason, Taiki is forced to compete in a watermelon-smashing and swimming competition, with the goal of spending time with Chinatsu at stake! What will be the outcome? And then, Chinatsu's birthday arrives.
This year, the two of us are going to the beach together… .