"I have to check if he's a boyfriend worthy of my older sister!" one day, my older sister brought her boyfriend home, but his appearance and impression weren't good! "What's good about this man?" I thought, so I decided to try various things to judge if he was a suitable boyfriend! First, I stimulate him intensely by kneading his nipples 360° from behind! Then, I whisper lewd words in his ear that would melt his brain! Then... he moans in agony and cums instantly! "It's the worst to feel so much when my older sister is right next to me!".