■Mr. Mayu's One-Year-Old Sister

A physical relationship between a bloody brother and his sister. Two older brothers and a younger sister are at a hot spring inn where no one knows. My younger sister, Mayu, who tends to be sexy and entrenched, inevitably depends on her brother both as a playmate and Etch's partner. She trembles on her sensitive body when she pushes a small, narrow bean sprout while shaving her nipple. The sperm of the middle-aged brother is taught to his obedient sister, who squeezes every drop.