A genius with an IQ of 200. He's usually seen with a laptop. He saves Keito's sister when she was in trouble with other girls. He's a computer geek. He's one of Keito's friends. Kouchi actually dropped out of school because he thinks it was boring to stay with too many idiots there.

Kouichi spends much of his time indoors at the computer lab of the Free School where he can create his computer programs for his job. Because he spends so much time indoors he is quite pale and skinny and doesn't talk much. Despite all this Keito, Rei and Momiji are friends with him and they look out for each other.