The narrative centers on Yukami Makoto, a high school student who enjoys visiting hot springs as a hobby. His hundredth visit takes place at Miyama-kan, an inn managed by four poster girls: Tokura, Akino, Tsutsuji, and Mitomo. During his stay, Makoto spots Yuri, a hot spring goddess, and inadvertently takes over her powers. Consequently, Makoto finds himself employed at the inn.