"Stepmother, you want a child, don't you?" During my husband's single assignment while I was indifferent, I was repeatedly penetrated by my sexually voracious stepson, Kazuya... Shiraishi Marina JUR-673

Marina is married to a man with a stepson. She has a good relationship with her adopted son, Kazuya, but still desires a child of her own and actively tries to conceive. However, her husband is suddenly sent on a long business trip... At first, Kazuya lives a peaceful life, but gradually physical contact increases, and Marina begins to feel something is amiss. His behavior becomes increasingly bold, eventually culminating in him intruding on her while she is bathing...