JUR-701 Her sister's intense training has my crotch rock hard… My muscles and erect dick are being vigorously rubbed, soaked in sweat and love juices, enjoying the beauty of her body and cheating sex with cum inside. I'm the lowest piece of shit. Yuki Tak

Hey Shin-go, go get trained by your sister! "I'm currently living with my girlfriend Miyu on weekends, in a semi-cohabiting arrangement. One day, her sister Yuki suddenly started living at Miwa's place. Apparently he's studying hard because of his wife's affair. Ms. Yuki works at a personal gym, and thanks to Miwa's recommendation, I ended up training under semi-coercion. Muscular body, beautiful face right in front of me, and I'm rock hard. Ms. Yuki notices my excitement and keeps escalating the seductive training…