I'm growing up At Yamada's home, Kyotaro dries off and then takes a bath. Yamada provides him with a change of clothes but forgets his underwear, Kyotaro feels a bit embarrassed wearing only a tracksuit. He goes to grab his underwear but Yamada's pet dog almost pulls his tracksuit off, after a series of mishaps he finally gets everything in place. The two take a break and have a hotpot supper, looking at Yamada's yearbook...