NAKAHARA Yuu

To all his schoolmates, Jin comes across as a hot-headed class clown who typically barges in late, sleeps the whole way through classes and always responds to any situation with reckless stupidity. The fact that he used to be the charismatic leader of a legendary biker gang has turned into an urban legend; however, after starting a rivalry with the captain of the school…

From Endless Abyss: Hatogaya, a man who loved baseball and yet left it, is set up to take the fall for his company and gets sent to prison. A high-school principal and his former coach whose school is about to lose its baseball program bails Hatogaya out. But, in exchange for getting him out of jail, he has to coach the schools not-so-great baseball team.