GVG-397 My Big Sister Is Giving Me A Real Lesson In Sex Education Mio Oshima

Mio, who lives with her parents and younger brother, gives sex education with her own body in order to teach her younger brother, who has learned "konnyaku masturbation" from an erotic book picked up on the street, the correct sexual knowledge. . A serious but naughty older sister gently guides her younger brother with her healthy sex education!