Ranma ½: Season 1, Episode 74

1 - 74: A Formidable New Disciple Appears

A young man is awestruck when he sees Happosai in action, and seeks out the Tendo Dojo, wishing to become a student of Anything Goes Martial Arts. The master accepts, and it soon becomes apparent that he's a very dedicated pupil... at bit too dedicated if you ask Ranma.