Married for six years, Ai's husband shows no interest in sex despite their good relationship. Ai's neighborhood has a partnership with a foreign country, offering homestays for foreigners to stay in the neighborhood's homes, and vice versa. Ai's home is chosen to host an exchange student for a week. From their first meeting, Ai is drawn to the muscular, fit body of the student, Oliver. She and her husband introduce Oliver to Japanese culture and cuisine. While handing Oliver a towel, he steps out naked, his huge cock hitting Ai's eyes! Since that moment, Ai can't get the image of his big, black cock out of her head. Similarly, Oliver is captivated by her beauty and large breasts. With Ai's husband at work, Oliver approaches her, desiring to fuck her. Despite verbally saying no, Ai's body responds to each thrust deep inside her by Oliver. For a week, almost every day, Ai and Oliver have sex when her husband is away...