A selfless woman, after being dumped and losing her job due to an infertility diagnosis, meets a younger man and impulsively proposes a bold arrangement to escape her despair.

Naoya Aizawa has been married for a few years to his colleague, Kana. The couple has a perfect life until a new employee named Noa Tachibana is assigned to Naoya’s branch office. Will Naoya be able to resist Noa’s temptation? What is the fate of this couple?