Erina Oka, a beautiful girl with watery eyes like a Pomeranian, makes her first appearance in Honnaka's popular series! She was on the ball from the first time we met! Her younger sister seemed to like me and actively seduced me. "Boyfriend, I can give you the creampie that your older sister can't do." I was flustered by her overly bold invitation. I couldn't stop showing my love for her, and I couldn't resist the temptation of my younger sister, who is honestly cuter than my girlfriend, and I ended up creampieing her over and over again!