Yuri, who has been married for five years. She is a woman with many hobbies and is surprisingly active despite her appearance. Recently, she's really into running and participates in marathons and such. While running as usual, she carelessly falls and gets injured. The man who helped her at that time later became her lover. Since she was usually treated like a maid by her husband, her heart wavered at his gentlemanly and kind treatment, causing her to cross the line. Then, consumed by infidelity, Yuri's desires flared up as she set off on an affair trip...
