Ohtani, who is rooming with a close friend, one day finds himself taking care of his friend's younger sister, Umisaki. Although she appears to be a petite beauty at 142 cm tall, she is actually quite the little slut! She teases Ohtani by flashing her underwear and nipples, driving him to the brink. There's no way he can hold back... His rationality snaps, and he spends the entire day fucking the cute little devil!
