Sentaro Daimonji shows up fearing for his life, wanting Ranma and Akane to help rescue his kidnapped matriarchal grandmother. It is reviewed that the martial arts tea ceremony was practiced by two opposing schools. The three enter the rivaled school to find the Daimonji matriarch. Sentaro meets Satsuki Miyakoji, successor of the rivaled school, and becomes betrothed to her, joining the two schools together.

Ranma, Genma, and Soun Tendo are hired to rid a seaside resort of the nasty marauding octopus pot that has been terrorizing the guests. Unfortunately for them, it turns out to be Happosai in a pot.