Yuu is staying at his aunt Ran's house for a while during summer school. However, he can't concentrate on his studies because of her unconscious sexiness... Ran, who is not satisfied with her husband and is frustrated, happens to see Yuu's young and strong cock and is Kokoro to it, releasing his pent-up sexual desire. Yuu's sexual awakening comes from having sex with her, and he violates her like a monkey. Ran, who has discovered the pleasure of his intense movements that she cannot get from her husband, also begins to...