Sentarou Kawabuchi  

Sen, 川渕 千太郎

At Higashi High School, a new student named Kaoru encounters Sentaro, who is in his first year and has a reputation as a tough guy among his peers. Despite being physically strong and talented, Sentaro is also straightforward and kind-hearted. Although they are very different from each other, Sentaro and Kaoru become friends when Sentaro expresses his passion for jazz music through the drums.