第 14 集: Junichi教Ai數學，並為對Sae發表冒犯性言論道歉

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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 mathematics 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 an Inago Mask utility belt, a gift that originally was for her 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. (Source: Wikipedia)