都内某企業で働く OL の美桜。 地味な見た目で真面目な性格だが押しに弱く周りに流されがち。最近太ってきたと感じた美桜はネットで見たサロンに通う事を決意する。しかしそのサロンは媚薬を使ってオイルマッサージを施す悪徳な店で。。。グラビア級スリム巨乳ボディが媚薬オイルまみれのテカテカ状態で痙攣！エビ反り！大絶頂！

Mio is an office lady working at a certain company in Tokyo. She has a plain appearance and a serious personality, but she is easily swayed and tends to go along with those around her. Recently feeling that she has gained weight, Mio decides to go to a salon she saw online. However, that salon is a shady place that uses aphrodisiacs in its oil massages… Her slim, busty body, worthy of a gravure idol, is covered in aphrodisiac oil, glistening and convulsing! Arching her back! Reaching a great climax!