GVG-559 Big Sister's Real Sex Education Maya Misaki

Maya is a kind older sister who cares about her younger brother. One day, Maya's boyfriend came to stay at her house. During the day, she played with her younger brother, and at night, Maya and her boyfriend enjoyed having sex. However, his younger brother was watching the act. Thinking that he is playing with himself as a nuisance, his younger brother insists that he should do the same. Thinking of her younger brother who has no knowledge of her sexuality, Maya gave her sex education with her own body.