Junichi, Kaoru, and Masayoshi head to the library to see the new Library committee member, but cause a ruckus there until Ai scolds them. Junichi later offers to teach Ai maths upon learning she’s taking makeup exams. While both of them are taking a break, Ai asks Junichi on what to do with her younger brother, Ikuo, since Junichi acts childish just like him. When Junichi is about to tell Ai his advice during lunch, he unintentionally offends her when he and Miya talks about Sae’s breasts. Junichi later apologizes, even humiliates himself in front of Ai and the swimming team on what he said and entering the school pool without permission. At the beach, Junichi tells Ai to spoil her brother a bit since he just wants her attention. As thanks, she gives Junichi a Inago Mask utility belt, a gift that originally was for his brother. Instead, he teaches her how to use the belt and gives it to group of young boys. That night as she goes to sleep, Ai realizes she likes Junichi.

Tsukasa drags Junichi to the local shrine and learns he never really read her notebook. However, she blackmails him to keep her other personality a secret. But when he tries to talk about it with Masayoshi, Tsukasa catches him red-handed and forces him to work very hard in helping with the festival. While working late one night, Junichi finds Tsukasa painting one of the festival’s attractions. He learns that she works very hard and takes important positions in school to maintain her image and reputation as a school leader. The next day, Kaoru tells Junichi that Tsukasa passed out from overworking so he visits her at her home to give her some bananas and energy drinks. During the visit, Junichi notices how serious Tsukasa is compared to her carefree older sister. The next day, Tsukasa is back to normal and helps Hibiki with entering the Miss Santa contest and what she can wear.