Cheer up! Sister Ito-chan with an angelic smile. Ito-chan was worried that her body remained a child forever! Small breasts, cracks that do not grow hair, and my body that does not grow day by day. Take your brother to the bed and take off your clothes and caress Ito-chan. My brother persuades Ito-chan, who is confused because he doesn't know, "Because it's necessary to become an adult!"