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16, "A Fun Profession" We meet Kimura-sensei, the girls' creepy Classical Lit. teacher. 17, "Pool, Pool, Pool" As the girls gather at the school pool for gym class, we get to see more of their physical limitations, as well as a few personality quirks. 18, "Ribbon" Nyamo is trying to teach swimming technique to her class at the pool, when Yukari (naturally) rudely interrupts. 19, "Just the Two of Them" At Yukari's insistence, she and Nyamo face off in a pool relay race. 20, "A Good Person?" The aftermath of the class relay race. Also, the girls spot Kimura in the park after school and start wondering what kind of person he really is.
Episodes
1A Child High School Student 2Osaka's Day 3Yukari and Nyamo 4Pool, Pool, Pool! 5Summer Break 6Sports Fest 7Culture Fest 8New Year's Dream Special 9Chiyo-chan's Birthday 10We're Second Year Students! 11Kagura And Sakaki 12Chiyo-chan's Day 13Midterm Exams 14The Ocean, Summer Kimonos, And A Party! 15Sports Fest, Second Year 16Culture Fest, Second Year 17End of Second Term and Christmas 18Yomi's Ordeals 19One Spring Night 20Third Year 21School Trip 22Entrance Exams Study Camp! 23Last Sports Fest In High School 24Yamamayaa 25Onwards, Entrance Exams! 26Graduation Ceremony