A sudden transfer was decided, and the younger brother-in-law, Atsushi, and his wife, Naomi, ended up staying at the Shiraki household for a while. Initially, the wife, Yuko, welcomed them warmly, but as time passed, seeing the harmony between her brother and sister-in-law and their sexless relationship made her feel restless... As her frustration grew, Yuko could no longer hold back and attacked Atsushi while he was asleep. Taken aback by the sudden event, Atsushi couldn't resist her lewd display and succumbed to his desires. From that day on, Atsushi became the object of Yuko's endless lust...
