Six months have passed since we welcomed Miyu, a stunningly beautiful and youthful woman, into our home as my stepmother. My son, right in the midst of puberty, began secretly watching her in the bathroom. One day, as he peered through a crack in the window, he caught sight of Miyu frantically pleasuring herself. The lewd image of her aroused body burned into his mind, and he could no longer suppress his desire. Though she initially resisted and firmly refused his advances, once she experienced the intense pleasure of his vigorous young lovemaking, she gradually surrendered herself to him, and a new, forbidden relationship began to unfold.