Ayumu is a hardworking yet timid kid who is constantly being bullied. One day, he finds himself being punched into the air... and waking up in a boxing gym! Thus, Ayumu's quest to become "just a little bit" stronger begins with the two wacky members of the Gold Boxing Gym. Will Ayumu finally stand up for himself or will his timidness get the better of him? (Source: MU)