Happosai wants to tag along when Akane and her friends make plans to go to a hot spring. However, Ranma, Genma Saotome, and Soun Tendo spoil his plans. He ragingly decides to use his ultimate technique on them, thought he has forgotten how to perform it, needing to acquire a special scroll that has the instructions. It is later found out that the technique was the use of firecrackers.