Non and Youhei have been childhood friends since their school days. They've been married for a few years now, and recently Yohei has seemed to have grown cold towards Non, but...it turns out that Yohei has been cheating on her. Non is betrayed by her beloved husband and falls into the depths of despair. What supported her emotionally was her father-in-law, Ippei, who lived next door to her. The love she had for Ippei, who had been good to her since they were students, comes back to life. When she came to her senses, Non realized that she had been subtly seducing Ippei, but she made up her mind and headed towards Ippei's bedroom...