SCOP-543 I saw my sister and her boyfriend having sex in a bunk bed, and the sexual desire that had been dormant in my heart blossomed. - The action taken by the youngest sister who was in heat because she couldn't control her excitement...

In the first part, the older sister brings her boyfriend home, and the younger sister, who is jealous of her older sister who shows off her lovey-dovey in front of the younger sister, takes advantage of the fact that her older sister fell asleep after having sex, and seduces the boyfriend herself. - In the second part, the younger sister was listening to her older sister having sex under the bed, and when she became horny and masturbated, her older sister's boyfriend noticed and the older sister went to take a shower, so she took advantage of the fact that she had sex with him. - Two intense lewd bed stories begin.