I, Who Was Seduced By Her Sister, Who Was A Good Licker, And Fell In Love With Her.

My name is Atsushi. When I went to my girlfriend's house for the first time since we started dating, I found out her little sister was living with her. By the way, my girlfriend is domestic and gentle. She's serious and passive about sex. But her little sister Nozomi is terrible at cooking and housework, but very proactive about sex. A true carnivorous girl. Nozomi has a licking habit and instinctively licks all sorts of things, and even with my girlfriend right there, she drained my heart and body, and I got addicted to her sucking technique...