[Main story with face revealed] An older brother hears a rumor that his younger sister is working in the sex industry, so he pretends to be a customer and goes into the store to choose his younger sister! He is determined to persuade her to quit, but when he sees her sexy appearance, his dick reacts... In order to reprimand his younger sister who insists on continuing her part-time job, the older brother becomes Kokoro... and gets his dick hard again, sucking on his sister's body! As the sense of immorality of incest amplifies his excitement, they start with a bare thigh fuck and pretend it was an accident, and then they have sex for a creampie! ! Three cute big-breasted girls appear!