Ep. 1: Loose Tooth, Super Ball Duel, Classroom Concert, and Rainy Day Walk

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Kazumi asks Ryōta for help removing a stubborn baby tooth. Later, Ryōta competes with Kouji in a superball bouncing duel outside a convenience store. Meanwhile, Class 5-2 students neglect cleaning duties to stage a rock concert with brooms, disappointing Yūki. On a rainy afternoon, Ryōta, Kōji, and Tsubasa forget their umbrellas. Chika and Natsumi assist them, but Ryōta cannot walk with the boys due to his size. Consequently, he joins Chika and Natsumi for the walk home. These four distinct events highlight daily school life interactions among the students.