My girlfriend, who I live with, is going back home for three days. At that time, her friend Honoka suddenly appears. I end up cheating on her with Honoka, who is a sadist and has a cheating attribute. I'm excited about the three days of non-stop sex, but she says, "Let's try something more pleasurable," and she takes out her strap-on and screws it into my ass! I was taught the world of "Cumming without ejaculation = female orgasm," and I had a dry orgasm for 72 hours, and was chased by her and had a "tokoroten ejaculation" over and over again.