I just wanted you to teach me how to put on a condom! My older sister, a wretched girl, has a sexual outburst after graduating from university!! She rides on her younger brother's penis, reaching orgasm through rubbing against him, and demands unprotected intercourse. (Tojo Natsu HMN-709)

My sister, a woman who's never been in a relationship before, graduated from university... and got her first boyfriend, which made her incredibly excited. However, having never had any romantic experience, she was a little worried about her first sexual experience... so she came to me and asked me to teach her how to use a condom! She said there was no one else she could ask but me... and I couldn't refuse! So I taught her how to use a condom, and then she actually asked for unprotected sex! My sexually awakened sister was full of curiosity and wanted to know the pleasure of unprotected sex...