A brother who lost his close sister in a traffic accident. His sister had large breasts, and every time she hooked her arm with his, the soft, bouncy sensation of her breasts pressing against him was unforgettable, leaving him with a lingering sense of unease and longing that never left his mind or groin… One day, he found a "sister rental" service online and immediately contacted them. However, he was warned that if he engaged in indecent behavior, the rental would be stopped on the spot and he would be banned… So, he decided to try an underground option. Would he succeed?
