A couple, Rinne and Tomoki, have been married for five years and still show an unwavering closeness. However, this summer, Tomoki's infidelity comes to light. They struggle with conceiving a child, leaving Rinne feeling devastated. Just when she hits rock bottom, her father-in-law, Tanigou, arrives for a business trip in Tokyo and decides to stay at their home. He has always treated her well since they lived nearby, and upon reuniting, Rinne finds herself drawn to him. As if in a trance, she begins subtly seducing Tanigou without realizing it until she catches herself. Determined to act on these newfound desires, Rinne heads over to his house...
