A close brother and sister. The brother who helps his sister with her first time goes wild with a thigh-high sex play!! ■ Urara-chan has her first boyfriend. She is going on a sleepover date, but she is nervous about it because it is her first time, so she consults her brother. She lectures him through his underwear about the flow of kissing, caressing, and penetration, but her brother can't help himself and suddenly slips in without a skin!! ■ Rin-chan comes home from work. She is tired and asks her brother for a massage. Her brother gets an erection when he occasionally peeks at her panties and the texture of her sweaty stockings. The sister gives in to her brother's plea for a thigh-high sex, and toying with him with a stocking thigh-high sex and then an underwear thigh-high sex. The brother who gets out of control can't help himself and slips in!! ■ Brother and sister are relaxing in the living room when their parents are not around. At that moment, the sister tries on the new swimsuit that her sister received. The brother who watches this gets an erection. The sister finds out, but she does a thigh-high sex on her mercy. He can't help himself and slips in with his sister!!