Araiya-san! Ore to Aitsu ga Onnayu de!? (2019)
Souta started to work part-time at a bathhouse that his family owns as a back washer. He ends up washing his classmate Aoi while trying to hide his identity. As he massages her with revenge in mind for her constant harassment, he discovers that Aoi has a one-sided crush on him. After he touched her hot skin, she also realized that the one who washed her was Souta.