"Kyoko" and "Rei" are mother friends who enjoy meals and excursions through the connection between their children. Both couples are in a period of boredom, and the two of them, who are in the prime of their lives, are always frustrated. One day, Kyoko, who works at an apparel company, finds a swimsuit in her clothes that she bought at her employee discount, and the two of them end up wearing bikinis.
