ROYD-114 100 million% horny because I keep hearing the AV from the next room! Big breasted childhood friend Mei Satsuki who has sex even though it's her first time

My younger sister, Mei, was distressed by the sounds of AV coming from her brother's room. One day, Mei reunites with her childhood friend Mamoru. Mamoru is drawn to Mei's mature appearance. The distance between the two of them suddenly narrows when they hear the sound of an AV coming from their brother's room next door. Frustrated by the sound of her brother watching AV, Mei feels intensely having sex for the first time with her childhood friend...