彼女と付き合い始めた僕は、さっそく同棲をすることに。彼女には姉がおり、僕らは偶然、姉が働く職場の近くへと引っ越すことになった。ある日、彼女が不在の家で僕がオナニーをしていると、妹から呼ばれた姉がやってきて目撃してしまう。とまどう僕を尻目に姉は巨尻を見せつけて誘惑、姉の色気に負けた僕はセックスを始めてしまい…。『制作・著作 株式会社ケイ・エム・プロデュース』
After starting a relationship with her, we quickly decided to move in together. She has an older sister, and by chance, we ended up moving near where her sister works. One day, while I was masturbating at home while she was out, her sister came in after being called by her younger sister and witnessed what was happening. Ignoring my confusion, her sister tempted me by showing off her big butt, and I succumbed to her sexiness, and we started having sex… [Produced and copyrighted by K.M. Produce Co., Ltd.]

– JavGG.net