Even though their children have left home, Kimika and her husband are still as close as newlyweds. One day, her husband goes on a company trip and has to leave home for three days. Naturally, Kimika sees him off sadly, but as soon as he leaves the house, she excitedly starts making a phone call. "Hello? My husband just left! I was itching to see you so badly...yeah...I'll be waiting." It seems that Kimika has been enjoying an affair without her husband knowing.