Having returned to Japan via a travelling circus, Mousse reveals to Ranma that he too now has a Jusenkyo curse as well as taking some of the water from the spring back with him. After an unsuccessful attempt to splash Ranma with the Jusenkyo water, Mousse is told by Akane to challenge Ranma again so he can defeat him and prove himself worthy to Shampoo. Unfortunately Shampoo catches onto Akane's plan and hands Mousse multiple exploding battle items to ensure that he'll lose instead of Ranma. Despite temporarily gaining the upper hand, Mousse is soon defeated, but does succeed in making Shampoo feeling sorry for him and allowing Mousse to live in the Cat Café with her.