Yu ends up staying at a relative's house for a week during summer training. However, seeing her aunt Maki's defenseless appearance makes her unable to study, and she masturbates in agony... Maki, who was captivated by his young and strong cock, used him to release her sexual desire that could not be satisfied by her husband alone. Then, Yuu, who was attacked by her and felt a sexual awakening, loses himself in her pleasure and starts raping Maki like a monkey. She herself becomes more and more absorbed in the endless sexual intercourse of her nephew...
