Araiya-san! Ore to Aitsu ga Onnayu de!? (Washer!: She and I in the Women's Bath!?)
In the story, male student Souta Tsukishima begins working at his family's public bathhouse as a back washer. While concealing her true identity, Souta's classmate Aoi Yuzuki visits the bathhouse. A relationship between the two begins to develop when Souta washes Aoi's back.
[Source: Anime News Network]