Rin's second cousin once removed, and guardian. He and Rin share a very close relationship, almost like a father and daughter or a brother and sister. For a short period of time he was in love with Rin's mother, his own cousin Aki, before she died. After her death he became Rin's official guardian. He is very protective of Rin and does not seem to like Aoki at all because of Rin's affection towards him, which makes Reiji very jealous. As the story progresses, it becomes clear that his inability to fully cope with his lover's death has resulted in his projecting his feelings for her onto her daughter and he has convinced himself that she will take Aki's place once she comes of age.
Age: 23 Height: 175 cm Weight: 64 kg Daisuke is the protagonist of the story. He works as a grade school teacher and is in charge of the third grade class 3-1. He often ends up in situations that make it appear as if he is sexually harassing Rin; though, he believes to be the other way around, with him as the victim. Later on in the series he begins to grow attached to Rin more and more. He is at first unsure about his feelings for Rin, but later on he comes to the conclusion that it is fatherly love and nothing more. (Source: Wikipedia) In truth, he was only fooling himself as his feelings for Rin were romantic and not paternal. He eventually comes to terms that he is in love with Rin because of who she is, rather than how she looks or who she looks like. The two later become a couple on her 16th birthday.
Age: 7, 11, 16 Birthday: August 17 (Leo) Height: 142 cm Weight: 34 kg BWH: 73-61-74 Rin is a young girl in third grade who has an intense crush on her teacher Daisuke. She has a mischievous nature and has proclaimed herself to be Daisuke's girlfriend; she will go to great lengths to make him fall in love with her. This has resulted in her crossing moral and legal boundaries many times, including blackmail and taking advantage of Daisuke's inability to respond to her forcibly advances by threatening to scream that he is trying to molest her, when in fact it is her that is making those advances. Despite Rin's mischievous nature she has shown herself to care deeply for her friends and family, going to any length to defend them. Also much of her bad behaviour is a result of trying to hide the traces of the vulnerable little girl she used to be as a result of a tragedy in her past.
Age: 10 Zodiac Sign: Capricorn Height: 148 cm Weight: 42 kg Sizes: 80 - 68 - 78 Another of Rin's friends, Mimi is a quiet girl who is unusually well-developed for a third grader. She was picked on by Aoki's predecessor, and quit coming to school to protect herself. In revenge Rin wrote threatening notes to him that caused him to eventually quit due to "work-related stress". After Aoki takes on the job of teaching the class, he manages to convince Mimi to come back to class. She is very studious and has a secret crush on Reiji. In the end of the manga she convinced Reiji to answer her feelings.
A young, well endowed teacher who is Aoki's colleague and friend at work. She tries to care for Aoki as he is still new to the job, and seems to have a crush on him, as she has asked him out on several occasions, only to be interrupted every time by some incident, usually involving Rin.
Age: 10 Zodiac Sign: Cancer Height: 139 cm Weight: 31 kg Sizes: 70 - 60 - 73 Kuro is one of Rin's friends, and is secretly in love with her, although the only one who appears to be aware of her unrequited love is Mimi. She therefore sees Aoki as her love rival. Kuro is notable for her foul mouthed behaviour as well as physical aggression towards others. It is also implied that her family is fairly affluent compared to other students. Possibly as a result of this, Kuro is obsessed with following the latest and expensive fashion trends and likes to show off her expensive clothing to others, which is usually in the Gothic Lolita style, sometimes combined with neko ears and tail. Many see her as a show off and a bad apple but she has managed to befriend both Rin and Mimi.