In the surreal atmosphere of a unique bathhouse, a forbidden love unfolds between two women. Located in a corner of a neon-lit red-light district, a soapland parlor sees a new girl named Tsubomi helping a departing customer put on his suit—only to be scolded by him in return. Dejected, she turns to head back to the waiting room. At that moment, her eyes fall upon Yumi, the parlor's charismatic top girl, being thanked and seen off warmly by her client. Filled with admiration for Yumi, Tsubomi soon finds herself drawn into a series of events that lead to what Yumi calls "training"—the beginning of a lesbian encounter. In this space swirling with desire, a new relationship begins to bloom.