GFD-001 I want my younger sister, who doesn't even know the meaning of service, to play with her nipples without feeling innocent like playing house Yayoi Amane

Synopsis

Can you make me feel my chikubi? Yayoi decided to help messing around with Chikubi because he had witnessed his brother's masturbation. At first, Yayoi was confused by the act itself, but when he began to feel happy with his brother's writhing appearance and facial expression, Chikubi improved sharply in a short time, probably because of his aspiration to "want to be more useful". You will be blamed. … Forbidden chikubi pretend to bloom the evil motherhood as a woman.