Ai is innocently in love with her uncle. Contrary to her feelings, her uncle has been gazing at her beautiful body with lustful intent, hiding his ulterior motives. One day, when they take a bath together for the first time in a while, he notices her erection and shows interest. Taking advantage of this, he violates Ai's virgin tight pussy. From that day on, her uncle's stopper is removed and he covers Ai, who does not know that their act is for procreation, with semen in his mouth...