Kodomo no Jikan

It is the first day of teaching for Daisuke Aoki and his third grade class. During the course of the day, he learns about the reasons behind Mimi Usa's extended absence from school. Her absence is due to a long-term harassment by the previous teacher. Neither the other teachers nor her parents believed her, so Mimi's only choice was to quit school. This enraged Rin and Kuro, so they harassed that teacher to the point of causing the teacher to have a nervous breakdown during class and quit. Later, Rin tells Aoki that she hates adults because of that incident.

Aoki starts off by assigning an essay about dreams, but the class responds with pessimistic views towards today's issues. At night, Aoki goes to a bar and rambles to his colleagues about how hard it is being a teacher. When they ask if there are any sexy teachers, Aoki accidentally mentions Rin. His colleagues tell him to move on to her, unaware of who Rin really is. The next day, it becomes apparent that Aoki's students' scores have begun to drop. Since Rin scored low on her test, Aoki asks her to come to a private lesson.

During PE class, Aoki notices Mimi's large chest. He starts thinking of a way to deal with it, and in the process, makes Hoin think that he's a lolicon. Later, Mimi goes shopping for a bra, but does not know anything about them, and ends up buying a bra that didn't fit her. Two boys at school make fun of her, so Rin and Kuro help Mimi purchase a bra by taking her measurements at Kuro's private clothing department.

Aoki gives all of his students a home visit notification. After talking with Shirai, Aoki's curiosity about his students leads him to the archives where he learns about Rin's mother. Aoki begins to treat Rin with a lot of care, however when he hands out the home visit cancellations, he slips up about Rin's mother, which causes Rin to become depressed for being treated like a fool. After Aoki visits Rin's house and talks with Reiji, he mends his relationship with Rin by telling her that she is important to him.

Summer break is quickly approaching, and Rin becomes saddened by the fact that she won't be able to see Aoki. Aoki tells her that he will still be at school to monitor the pool. Rin spends her summer with Kuro and Mimi, but at one point she is alone due to Kuro and Mimi's family-related absences. Rin remembers what Aoki says and goes to the school where she finds Aoki talking with Hoin. Aoki spots Rin and chases her to the pool where Rin pushes him in. She hugs him and they watch the fireworks.

A flash back is told of Reiji's parents and Rin's mother. Reiji's father was an alcoholic and got angry over minor things; one night his parents got in a car crash and died. Afterwards, Reiji moved in with his cousin Aki, Rin's mother, whom had lung cancer, but did not tell any one until it was too late.