“Hey! You were checking out my boobs, weren’t you?” My girlfriend’s new sister is super busty! Even though she has a girlfriend, she flaunts her estimated G-cup breasts and seduces me! “I’ll tell her you creampied me~?” Even though she’s supposed to be important… I can’t resist her advances, and my reason crumbles! Completely dominated by the bright and charming big-breasted little sister, I sneakily creampie her while hiding from my girlfriend!