Based on a novel by Hayashi Mariko, Tokyo Marigold is the story of a modern relationship in modern Tokyo under modern circumstances. Eriko (Rena Tanaka) has no definite plans, but is definitely single. Tamura (Yukiyoshi Ozawa) is definitely not single, but does have a plan. Why would a girl put up with the plan by an unfaithful man with a girlfriend? That is modern Tokyo standing in for the contemporary world.