Iori heads off to college and decides to live at his uncle's dive shop; during his first day in college, Iori gets dragged into the diving club's crazy antics.

After a cutthroat battle with Kohei Imamura, a handsome otaku from school, Iori ends up joining the Peek-a-Boo diving club. Iori arrives home worn out from the day, but perks up when he hears about a party with a women's college.

Iori and Kohei head to the sea although Iori used to be afraid of the water. Tokita and Kotobuki decide to hold a men's beauty pageant for the Izu Spring Festival. But the guys are reluctant to join in so try to get Chisa to join a women's pageant.

The Izu Spring Festival has begun and the group run an okonomiyaki stall with Iori, Kohei, Chisa, and Azusa helping out. Iori has a misunderstanding with Azusa and Chisa gets nervous and freezes up during the women's beauty pageant.

Iori and Kohei attend class in their underwear like normal, but everyone glares at them with a bloodthirsty look. It's because they heard that Iori and Chisa are dating. Sensing their lives are in danger, Iori and Kohei offer to setup a mixer.

Iori and Kohei get through their exams by cheating. Meanwhile, PaB throws a welcome party for Aina, their new member. Aina was looking forward to getting a new start to college life, but discovers that no one in the club is normal.