Aki is the current world super lightweight boxing champion. He has a tragic past, and when he realizes he can't get the revenge he wants, he does his best to ensure other orphaned children don't go through the same thing. He has the Hayakawa Foundation in honor of his family to promote sports among young people. 

Aki likes to keep his private life, especially his love life. Although he is not completely against having a family in the future with the right one.