My younger sister, who was in Tokyo for job hunting, said, ``Let me stay for a week.'' When she saw me enjoying a drink after taking a bath, she said arrogantly, ``What about me? I'm old enough to drink already!'' But after just a little drink, she turned into a muddy mess! Just when I thought he was making fun of my virginity, the next moment he mistook me for my boyfriend and begged me for sex! A huge ejaculation into my younger sister's pussy kills her in seconds! The next day, contrary to my awkwardness, my younger sister has no memory of anything. Then...it's okay to have sex every day!