My girlfriend's cute, big-breasted younger sister is too much!! Unable to resist the allure of her round, beautiful breasts without a bra, I, prepared to cheat, frantically penetrated her. (Nozomi IPZZ-669)

It's been six years since I started living with my girlfriend. It's undeniable that our nighttime sex life has gradually decreased as we've lived together. Then one day, I heard her sister was coming to visit from the countryside. When I got home from work, I was shocked! My eyes were met with her unguarded, wire-free breasts peeking out from under her shirt. Her baby face, combined with her adorable, almost animalistic features and H-cup breasts, created an incongruous contrast that was irresistibly attractive. My sister, with her suggestive words, said, "You must be looking at my breasts! Keep it a secret from your older sister!" Those fair, round, perfectly proportioned breasts were bewitching my crotch. Ugh... I want to lick them! I want to knead them! I want to squeeze them! While imagining these things, my sister pressed close to me and said, "They've gotten bigger here." How could any ordinary man resist such words! Even though she was right next to me, I greedily enjoyed those fair, erotic breasts! They were addictive, bewitching breasts that made me want to taste them again and again, to the point that even cheating became irrelevant! I'm just a worthless person who likes lolis and big breasts, and I don't think life is worth living.