Iori, who is down to his boxer, attempts to convince Chisa to share some of her clothes with him, so he can get dressed, but gets chased by the campus security instead.
While hiding from his pursuer, he runs into the other student from earlier, who introduces himself as Kouhei Imamura. Iori attempts to convince Imamura to give him some clothes, but is punched and has to deal with even more security guards instead.
Iori manages to find Nanaka and Kotobuki, who are trying to recruit members for the Peek a Boo diving club. Kotobuki agrees to give him some clothes if Iori can recruit another member to the club. He proceeds to find Kouhei and tricked him into joining the diving club.
The diving club then starts a drinking party, where Iori and Kohei end up playing drinking games against each other. The two of them wake up the next day hungover and stripped down to their boxers sitting in class.