Megu, a serious and excellent student. While studying in her room, her brother came in and offered to give her a massage, but his hands became increasingly sexual and he started groping her breasts. She has no experience with men. Plus, Megu, who is weak to pressure, ends up having sex with her brother! She can study, but she's clueless when it comes to sex. While feeling nervous, she decides to let her brother teach her everything that feels good!
