My girlfriend and I live together, and her best friend came to stay over. But that best friend is a secret villain who loves to cuckold other men! I love her, but when she presses her big tits against me and touches my crotch, I lose all sense of reason! Unlike my girlfriend, she's OK with raw sex! She's OK with cumming inside me! She's a forbidden partner that I shouldn't have sex with, but when a woman like this tempts me, I can't resist! Kokoro of immorality and guilt become arousing factors during sex, making me feel even more erotic!