"If you get a girlfriend, I'll tell you what to do. First, close your eyes..." The older childhood friend's lewd meddling! S HUNTB-703

My older sister has always been very kind to me since I was little; we even lived together and she listened to our problems. One day, I got a girlfriend! I told my sister, and she was overjoyed… “Don’t disappoint your girlfriend, treat her well,” she said. She even gave me some advice on sex! And not just advice? Here, I was actually supposed to put it into practice? I had no choice but to do as my sister said. But is this not practice, but real sex?