My girlfriend's sister seduces me with her big tits and creampie OK Amatsuki Azu

The story revolves around Hayato, who finds himself drawn to his girlfriend's sister, Xing, due to her physical attributes. As they spend more time together, a complex web of relationships and desires emerges, leading to intimate encounters between Hayato and Xing. The central dramatic tension lies in navigating these relationships, consent, and the consequences of their actions.