Erina jokingly teases her younger brother, who has never had any luck with women. The virgin mistakes her taunting for an invitation, and the moment their parents leave, he shoves his cock into his adult sister role-play partner. The furious pace quickly makes Erina cum, but her inexperienced brother does not even notice and keeps thrusting with everything he has. His relentless pounding never slows down after her orgasm, making her climax again and again until their parents finally come home.