My days were filled with studying and masturbating. But my life changed drastically when my parents remarried and I got a slutty stepsister. She caused chaos every day, making me irritated. When I complained, she said, "You're annoying," and even forced herself on me, taking my virginity completely. Should I get revenge? My never-softening dick goes full throttle against the strong-willed slutty gal and her friends in a sex battle!