Yousuke Saeki
Dormitory representative and the son of the Chairman of the School Board. He finds out early on that Momoko is actually a girl, and he tries to black mail her into going out with him. This fails, though when Itou counter black mails him by getting his sister to take a picture of Itou kissing Yousuke, claiming that he would destroy his reputation for Momoko but that Itou on the other hand would be ruined. Yousuke later becomes good friends with Momoko. (Source: Wikipedia)