Zhou Kyulkyung is a pediatrician who works at IOI Hospital and loves kids more than anything in the world. Until the new surgeon comes to town. Jung Chaeyeon, who rejects both guys and girls faster than the speed of light is cold-hearted and mean, except when dealing with her patients, while she carries a dark past that she absolutely cannot forget about. Kyulkyung, who is very determined, tries to flirt with Chaeyeon, but is only cut off by a scoff. The IOI Love Game is on, and whoever fails to resist the urge to interact with doctors from other departments will lose points automatically. The building with the most points left will get to do whatever they want to do to a doctor from any other building for a month. And they can choose any target they want. How will it go for the both of them when they keep seeing each other while the IOI Love Game is on? Will they start to fall for each other or will they not except each other?