Titre original : My Big Heartbreak
It's already spring-time in Kitansanriku, and a new school year has started. Aki is now a senior in high school. Thanks to the success of the opening day of the parlor train, Yui and Aki by now are the most popular high school girls in Iwate. Aki looks up at their billboard, seemingly happy recalling those times with Yui. Fans are still going to the station. They are told they can still see Yui every Saturday at the station. But with Aki... As Daikichi had promised Haruko, Aki's PR activities for the train have stopped and she's back to being a normal high school girl. However... At the Diving Department, Isono is nervous to be having more girls enroll in his class. "I've never taught with girls in front of me!" Aki: "I'm a girl!" Isono: "I don't think of you as a girl!" Isono, boosting up his confidence, comes in his class but the girls are more interested in Aki. "Here she is!" One of the girls trick her into saying "Jejeh" by pretending there's a cockroach.