[Big-breasted wife falls into the pleasure of raw sex through wife swapping] Fumika, a young wife, is feeling lonely as the heat between her and her husband has cooled off like it was in the early days of their marriage. One day, she is invited to swap partners by a married couple who are friends of hers. As long as she wears a condom, sex doesn't count as cheating... Persuaded by her free-spirited female friend, she starts playing around. At night, Kokoro is moved by a cock that is better than her husband's. Even though the condom breaks from the strong thrusts of his hips, she becomes even more excited by the pleasure and immorality! She is driven crazy by the follow-up pistons after the creampie, and becomes addicted to true cheating sex...