HBAD-725 Mizuki Shirayuki, the L-cup busty girlfriend who was seduced by her big-dick senior

My girlfriend, Mizuki, is cute, has huge L-cup breasts, and loves sex. She's the perfect woman for any man. I've been living with her for six months now, and we have sex multiple times every day, but I never get bored. When my friends come over to hang out, we're always flirting with each other so they don't find out, but they find out, and my friends, who have always wanted to have sex with Mizuki, put her to sleep with sleeping pills...