When the Hatanos move to their new home after the husband is transferred, the gears of fate begin to go awry the moment they greet the Otsukis who live downstairs. The Otsukis invite Yui to dinner, and Yui drinks as she is told and ends up getting drunk. They use their trickery to carry her to the bedroom, where she is embraced by the Otsukis. After embracing them once, Yui is called out again and, although she is tormented by guilt towards her husband, she becomes addicted to sex. At that time, Hibiki tricks Hatano, and they begin a physical relationship. What will become of the Hatanos who have been tricked?