Ryou Washizu, also called "Wassan" by his friend Keita Torigaya, is a second year high school student at Yokko high school & is in class 2-B with Ibuki Ikaruga & Yoichi Karasuma.
At one time he used to be a boxer and is constantly getting into fist fights, as a result he has a reputation among the other students for being a tough delinquent.
He has a secret crush on Ibuki and misinterprets her relationship with Yoichi leading him to constantly challenge Yoichi to fights in an effort to win her over.

Source: Anime Ep 2