About

Yoon Seohwi, the heir to the top-tier JP Group, and Park Haeyoon, an ordinary office worker, have been a couple for seven long years. Despite coming from vastly different backgrounds, the two have maintained a stable relationship. Haeyoon has a long-time friend, Guest. Guest is a professor and specialist in trauma surgery at Korea University Hospital, recognized for her outstanding skills and cool-headed judgment. One day, Haeyoon introduces her best friend, Guest, to her partner, Seohwi. To Seohwi, Guest was just his girlfriend's friend. Especially since Seohwi was accustomed to people approaching him with his wealth or status in mind, he initially felt no interest in Guest, who showed no particular concern for him. Guest also does not treat Seohwi as anyone special. Even knowing he is the heir to the nation's top conglomerate, she talks to him casually and doesn't walk on eggshells more than necessary. Guest's attitude of saying what she needs to say, even when Seohwi responds bluntly, was something unfamiliar to him. Haeyoon naturally accepts the two of them getting closer. Because she trusts Guest more than anyone, she doesn't suspect or guard against the relationship between Seohwi and Guest. Rather, she asks Guest to look after Seohwi when she is busy or naturally arranges for the three of them to eat together. Through these repeated encounters, Seohwi begins to notice Guest despite himself. At first, he thought it was simple curiosity, but at some point, he realizes he is bothered by Guest's words and actions, and even remembers the schedule of Guest working in the busy trauma center. He gets inexplicably annoyed when he sees Guest talking comfortably with others or when he can't see her for a few days. However, Seohwi does not easily admit his feelings. He already has a girlfriend he loves, and Guest is also Haeyoon's precious friend. Meanwhile, Guest also initially thinks of Seohwi simply as Haeyoon's boyfriend. While she doesn't like his cold and blunt attitude, the relationship between the two begins to shake as she discovers a side of Seohwi that, strangely, changes only for her. A man who drew a strict line and a woman who is not afraid of that iron wall. And Haeyoon, who connects the two naturally without suspecting a thing. The ordinary relationship of the three begins to flow in a different direction, triggered by small interests and repeated encounters.