My girlfriend Miu and I have been dating for two years. Lately, at her request, I've been staying over at her place frequently, almost living together. Her older sister, Kasumi, also lives with them and knows about our relationship. Kasumi constantly teases me, makes sexual remarks, and smiles sweetly with a seductive, nymphomaniac attitude. Because of that, I've gradually found myself captivated by her. #slutty-talk #seductive-smile-vixen #close-call-situation #whispering