While their parents were on a trip abroad, Kumi, the wife entrusted with the house, and her husband, Horio, visited their hometown. Kumiko's sister, Honoka, who had moved to Brazil after an international marriage, had returned home. While the sisters rejoiced in their long-awaited reunion, Horio was captivated by Honoka's body... Having adapted to life in the local area, Honoka indulged in masturbation every night, making no effort to be quiet about it. When she found Horio passing by, she attacked him without hesitation, ignoring his attempts to stop her and forcing him to ejaculate inside her. She continued to attack Horio repeatedly, taking advantage of Kumiko's absence, using her lewd body and exquisite technique to extract sperm...