'Rio', a girl whose breasts have finally begun to awaken. The cute girlfriend was troubled, and she was embarrassed that she had an undeveloped and childish body line. In addition to sticky skin that sticks to it, pure eyes, and a smooth vagina that doesn't get in the way. A single man calls out to her and brings her into the room to make her an adult. Aside from Rio-chan, who is happy to meet someone who can solve her troubles, I will deliver the carnal story of a man who can not hide his erection when imagining the feast that will start from now on.