In their fourth year of marriage, Namami's husband Hiroshi had just started his own business and was swamped with work. Coupled with the monotony, they had stopped talking to each other altogether. In stark contrast, Hibiki, who had moved into the apartment across from them, had a great relationship with her husband. Every time Namami saw them together, she felt envious. Eventually, after learning about Namami and Hiroshi's strained marriage, Hibiki invited them over and proposed a weekend wife-swapping arrangement…
