Manga by author Ozawa Toshio

Born in a family of delinquents,Nanba Tsuyoshi is expected to succeed his older brother as the strongest delinquent in school. Unbeknownst to his family however, he decides to enroll in the top high school in town to live as a normal high schooler. Can he maintain his double life as the strongest delinquent in town and as a normal high schooler?