Kumiko's older sister, Honoka, who had emigrated to Brazil after an international marriage, had returned home when her wife, Kumiko, and her husband, Horio, who had been entrusted with their parents' overseas trip, visited their parents' home.Horio was fascinated by Honoka's body while glancing at her sisters who were delighted to see her again after a long time.Honoka, who had become accustomed to her local life, didn't care about her sleeping girlfriend, Kumiko and his wife, and she was indulging in her masturbation with a loud voice at night.When she happened to spot Holio as she passed by, she attacked him without hesitation, ignoring her restraints and making him pour sperm into her vagina.After that, she attacked Horio many times while looking for Kumiko's openings.She squeezes her sperm with her obscene limbs and brilliant techniques.