I succumbed to the seduction of my girlfriend's younger sister, Mito-chan, and ended up having a physical relationship with her. I betrayed her...but Mito-chan was the one who asked me out after all...I don't have time to dwell on such things, as Mito-chan's seduction continues. She charges into the bath in a school swimsuit and gives me a handjob and a blowjob, and I feel like a fool for holding back! I'll fuck you all night long, I'm sorry my dear girlfriend, it's your sister's fault for seducing me with such a sexy body!! *This work is a sequel to "29th day of abstinence...I promised to have the most pleasurable sex after abstaining from masturbation for a month, but I succumbed to my girlfriend's younger sister's reverse NTR seduction and even after using up a box of condoms, I couldn't stop and ended up having raw sex and cumming inside her many times This is an excerpt from "Mito Wakui" (product number: dvaj00641).