Airi, the wife of an elite section chief, and Kaori, a beautiful and reputable mom friend. They were supposed to be best friends, but Kaori is actually very jealous of Airi. Kaori, who has a tragic past and is obsessed with high-spec men, tries to tear Airi and her husband apart by any means necessary, and the family is entangled in her schemes. Then, a certain incident causes resentment between the couple, and Kaori makes a move to steal Airi's husband away.