Kodomo no Jikan

Rin, Kuro, and Mimi spend the day at various shops searching for a birthday present for Aoki and even buy a book of charms. However, after Rin runs out of money, they decide to stay over at her house for the night to make presents for him instead. There Mimi meets Reiji for the first time and falls in love with him. Kuro makes a voodoo doll of Aoki and Rin makes herself as the present. The next day, they go to school to give Aoki his presents.

This 90 min special re-caps the events of the first season. Originally released as an OAD sold with the Limited Edition of Volume 5 of the Kodomo no Jikan manga to promote the second eason.

Kuro wants to become friends with Shirai, because she admires her and feels they have something in common (i.e. hating Aoki). As a sign of friendship Kuro gives a white hair pin to Shirai and wears a black version herself. One day, Shirai inadvertently hurts Kuro's feelings by dismissing her infatuation for Rin as abnormal. After realizing what she has done, Shirai eventually decides to wear the white hair pin in front of Kuro, making her very happy. Shirai ponders what her life would be like if she had a friend like Kuro in her youth.

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 finds Rin sitting up in a tree. He tries to apologize for his earlier behavior. Rin shows off her new look, "low-rise", which is extremely revealing. Reiji unwillingly allows her to wear it. He walks her to school, trying to block other parents' view of her. He is accused of being a molester because of his close proximity to Rin's backside. Aoki and Reiji have a silent mental conversation threatening/accusing one another. Before leaving, Rin kisses Reiji good-bye, which makes Aoki (for reasons even he does not understand) jealous. Rin becomes the Class Representative. The day passes and Rin appears to be making a sincere effort to be a good Class Rep. Aoki asks her to have the class clean the backyard after class. When he enters his classroom after it is over, he notices that all the students backpacks are gone. He immediately misinterprets this as that they ditched the work. Aoki finally runs into Mimi and Kuro, who are cleaning the backyard. Rin realizes that he had no trust in her to complete the request he made and, sincerely hurt, she runs away. Aoki finds her up in the tree. After accepting Aoki's apology, she goes to climb down, slips, and falls revealing her body. Aoki is slapped for this, but forgiven as usual.

The school is making preparations for the sports festival, and Rin is inspired to 'do her best' towards the day. Aoki and Hoin use faux intimidation to fire up the kids, although it doesn't go as planned on Aoki's part. Hoin comes up with the idea of a costume parade for the teachers, which Shirai is totally against until Kuro gets excited about her dressing up. On the day of the sports festival, Rin is suffering from a chest cough from working on a banner late into the night. She declines Kuro's offer of taking her to the nurses, stating that she wanted to work hard for Aoki as thanks for seeing through the mess that she is. Kuro is upset to find Shirai had dressed up as a panda, but Shirai hugs her to calm her down, going against her beliefs of skinship. Mimi laments that she misses her father's comfort, and when her mother arrives to cheer on her brother instead, she breaks down and cries. Rin manages to win the relay race for her class, but later that night her cough is still bothering her.

Rin catches a fever from being overworked and has to miss school. Mimi is still feeling lonely and Kuro scolds Aoki because Rin got sick for his sake. Mimi visits Rin's house in order to deliver a handout. Delirious from the fever, Rin asks to suck Mimi's breasts, which she allows in order to help her. Kuro gets Shirai to walk her home, who then apologises for what she said before. When Reiji notices Mimi's loneliness is similar to how he used to be, he comforts her and assures her that happiness will find her someday. Rin comes back to school healthy and later catches up to Aoki and kisses him.