Furinkan High's principal returns from a long trip to 'study' American educational system, unfortunately he turns out to be completely insane. His first order of business is to institute a policy of buzz cuts for boys and bowl cuts for girls unless the students can find the coconut with a 'get out of rules free' note in it...

To help him carry out his new position as Furinkan High's Moral Guardian, Kuno turns to Happosai for training.

Furious at Ranma for delivering him into the hands of a mob of angry women, Happosai brands Ranma with ancient mark, causing him to become 'as weak as a mere babe'. Upon hearing this, his enemies start lining up to give him a beating... What's poor Ranma to do?

Armed with the 'Hiryu Shoten Ha', Ranma goes after Happosai. But the old master, knowing something is up, keeps his temper, rendering the attack useless unless Ranma can figure out some way to get him really worked up...