The Hot Water Fortress (お湯の砦 O-yu no toride?) is the 237th chapter of the manga and the third chapter of the Pantyhose Returns Arc. Ranma flashes her breasts and Happosai escapes so he can fondle them, barely missing the Jusenkyo water. Akane tosses a kettle of hot water on Pantyhose Taro and he escapes to retrieve his spring water. Soun has an idea to keep Happosai in a bathhouse so that no matter how Pantyhose Taro strikes he will have to turn back into a boy to retrieve Happosai.