Friends and sisters Cecil and Saya. My favorite father remarried, I decided to live with my new brother – in – law brother – in – law. One day, my father and mother went out during a hot spring trip and only three of my sister and brother-in-law were at home. I talk to my older brother-in-law who is living together but there is no sense of excitement, a shy shy sister sets a distance from his brother-in-law. That night, a brother-in-law who drowns in a sister’s room sleeping in a two-tier bet. My older sister who is sleeping in the lower row is forced to get rid of her pajamas, but her sister who was sleeping over leaking out and his estuarity due to the shaking of the bed! My brother-in-law who has noticed it tastes a sister’s don bowl in a bunk bed

仲良し姉妹のセシルと紗也。大好きな父親が再婚、新しい母親と連れ子である義兄の5人で暮らすことに。ある日、父と母が温泉旅行中に出かけ家には姉妹と義兄の3人だけに。同居間もない義理の兄と会話をするが盛り上がり感はなく、人見知りの妹は義兄と距離をおいてしまう。その夜、2段ベットで眠る姉妹の部屋に息を潜ませ忍び寄る義兄。下段で寝ている姉はパジャマを脱がされ強引に生姦されるが、上で寝ていた妹が漏れる吐息とベッドの揺れで発情！それに気がついた義兄は姉妹丼を2段ベッドで味わいつくしちゃいます