The Mousse Returns Arc is the 20th story arc covered in the Ranma ½ manga, spanning five chapters. This arc was included in volume 10 of the Weekly Shōnen Sunday tankōbon and split between volumes 8 and 9 of the Viz Media tankōbon.
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.
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(Ranma ahiru ka keikaku)
(Akane ahiru ni naru)
(Mousse no shiawase)
Tendo Family's Annoying Acquaintances!
- Mousse returns to Furinkan.
- Mousse is revealed to have fallen into the Yazunīchuan spring at Jusenkyo and now turns into a duck.
- Ranma fights Mousse once again.
- Once defeated, Mousse begins living and working in the Cat Café.
- Mousse's cursed form