Happosai has claimed one of the urns to store his 'collection', but Ranma manages to steal it back. Of course, the master takes this as a personal insult, and starts causing considerable trouble for Ranma and the others as they travel up the mountains to find the place that will activate the urns.

When Ranma tries to force Happosai to stop the underwear stealing, the old master gets mad and starts terrorizing the inhabitants of the Tendo Dojo, demanding an apology.