Akané decides to learn how to swim and the principal a bit crazy of the college will take care of his learning. As for Ryôga, he finds himself with a magic graffiti on his stomach. Designed by an expert in martial arts, this graffiti makes Ryôga the strongest man in the world. Unfortunately this ridiculous drawing shames him and he will only be able to erase it by losing it in a fight. Ranma is the number 1 candidate to save Ryôga!