Stressed and feeling unwell, Aya Ueha visits a spa with her husband at his suggestion. Coated in oil and relentlessly teased around her most intimate areas, she writhes through repeated orgasms while struggling to suppress her moans. Unable to forget those unfamiliar sensations, she returns and finds that her husband, a regular customer, is receiving treatment nearby. Even with him beside her, Aya surrenders to the forbidden pleasure. Her newly awakened body is pushed further, ending in penetrative treatment, countless arching orgasms, and creampies.