Sayama Miyabi is a talented saleswoman who works at Celeste Real Estate. After being dumped by her boyfriend on their sixth anniversary, she decides to focus more on her career than on romance. By chance, she meets Donose Tsukasa, the CEO of a high-profile company who is seeking a marriage without emotional ties. Seeing how Miyabi prioritizes her work, he proposes the idea of a business marriage. Despite being taken aback by the sudden proposal, the two—who share common interests—decide to move in together. The only condition of this marriage is that if either of them develops romantic feelings, they must divorce immediately! However, the days leading up to the wedding are filled with an ideal lifestyle and constant excitement… Even if they fall in love, they mustn’t let anyone know! What will happen to the business marriage…?