"Stepmother, you want a child, don't you?" While my indifferent husband was away on a business trip, I was continuously penetrated by my sexually voracious stepson, Yuya-kun... (JUR-333)

Aya is married to a man with a stepson. She has a good relationship with her stepson, Yuya, who is already an adult, and lives a fulfilling life. However, she is actually feeling lonely and unsatisfied because her sex life with her indifferent husband is not enough… Just then, her husband decides to go on a long business trip, and her life with Yuya unexpectedly begins. Then, she begins to feel uncomfortable with his inexplicable attempts to get closer and increase physical contact, and tries to keep her distance, but Yuya becomes increasingly bold in approaching her…