東京で芸能活動をしていたえまは突然引退を発表し田舎の実家で堕落した生活を送っていた。ある日義弟と数年ぶりの再会しがた彼は童貞でオナニー三昧だった。姉のノーブラ無防備な姿に興奮が止まず襲い掛かりついにはSEX をしてしまう。えまも久しぶりのSEX が気持ち良くて絶頂しその後も何度も性交を重ねてしまう。
Ema, who had been working in the entertainment industry in Tokyo, suddenly announced her retirement and lived a decadent life at her parents’ house in the countryside. One day, she met her stepbrother for the first time in several years, who was still a virgin and constantly masturbating. He was so excited by his sister’s defenseless, braless appearance that he attacked her and they ended up having sex. Ema also felt good after a long time having sex and climaxed, and they continued to have sex many times after that.