"Hayate and Takayuki have come to the stadium to cheer Shun on in his handball tournament, but for some reason Shun's friend Souma is missing. It turns out that he went onto the wrong train... Meanwhil Shun is really fired up about winning as much as possible to prolong being together in a team with his teammates who will retire after this event, but the hype backfires and he can't quite perform right..."

Hayate is helping Shun with his summer homework and suggests he reads Igarashi Motoharu's novel for his book review assignment. However, Shun doesn't like reading anything but manga, so he thinks he should just ask the author and contacts Motoharu. Meanwhile, on his way to Mawarimichi Cafe, Souma sees a bunch of people dressed for the summer festival and thinks they should all go.

Souma invites Motoharu to go to the summer festival with Hayate, Shun, and Takayuki. After meeting Takayuki again, Motoharu also got to meet all the others. Having a natural talent for communicating, he's become friendly with all of them, except for Hayate. Hayate is always nervous, leaving Motoharu a little sad that they are not making progress. Therefore, Motoharu takes this opportunity to put a new idea to the test...