The cousin and arranged fiance of Sachiko; in order that a trusted man inherit the Ogasawara company, their engagement was arranged, although Sachiko detests it and denies that he is her fiancé. (It is later revealed that Sachiko once loved him and had her feelings spurned, which resulted in her disdain.)

First introduced when he is given the role of the prince in Cinderella: the joint play put on by the Hanadera school and Lillian Jogakuen. He has prestige in the Hanadera school since he is president of the Student Council there. However, by the time Sachiko reaches her third year, Suguru has already graduated.