Airi, who lives modestly with her doctor's husband, witnesses her husband's cheating scene one day.A married woman living in the same housing complex next to her husband ... Yes, her husband was having an affair with her other married woman.She consults with her husband, Tanaka, but she doesn't believe her and they decide to peek at the moment of cheating.Witnessing the decisive moment and hurt, the two try to make up for their loneliness by closing the distance.Two people who have their life partner cuckold start running into an affair seeking each other from unsatisfied hearts.