The series follows , a high school student who works part-time at his family’s bathhouse as a back washer. He unexpectedly ends up washing his classmate Aoi Yuzuki , a popular volleyball player who often treats him harshly but secretly has a crush on him. The story is a short-form adult romantic comedy that explores their awkward relationship behind the "red curtain" of the bathhouse.

: By the end of the episode/start of the next, Souta loses consciousness due to the heat of the sauna and eventually wakes up with his head in Aoi's lap, marking a shift in their relationship. Series Overview

: Inside the sauna, characters Sasakura and Aoi have a tense interaction. Sasakura admits to Aoi that she also has feelings for the protagonist, Souta Tsukishima.