"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..."

Shun gets a letter from a younger girl at school. After opening it, he realizes that it's a love letter and is about to immediately reject her when his friends stop him. Instead, they convince him to write a letter back. But since he has never really written a letter, let alone a response to a love letter, he agonizes over what to write. So he asks Hayate, Takayuki, and Souma for advice, but none of them are particularly helpful...