Kyoung-il meets Kyoung-ho while purchasing a used camera, but Kyoung-ho hesitates to let it go, still deeply attached to it. After a brief argument, Kyoung-il takes the camera. Though they believe this encounter will be their last, fate has other plans, bringing their paths together once more. Hiding each one’s own secret, they realize that their feelings for one another are about to bloom.
Ji Yeon-hee is an extremely shy, introverted 23-year-old girl with zero dating experience and a tendency to blush when talking to someone she likes. One day, four young men move into the house right next door to Yeon-hee's home, and to her surprise, they turn out to be Chanyeol, D.O, Baekhyun, and Sehun from her favorite boy band EXO, who are looking to lay low for a while. They hire her to clean their house part-time during the winter vacation and that's when Yeon-hee found out that Chanyeol was her long lost childhood friend and crush "Chan" and is the grandson of the house owner. As the story goes on, Yeon-hee soon becomes involved in a love triangle with Chanyeol and D.O.
