SCOP-344 As a virgin, the day before my first date with her, my sister asks her to become a sex prac

<p>A virgin younger brother who is about to have his first date with her tomorrow. My delusion swells, and if I have sex, I'm worried that she will make me foolish if I can't do it well, so I consult with my sister. I managed to defeat my sister who was not enthusiastic at first and asked her to become a sex practice table.</p>