In an amusement park where it is said that if you work, you will have a girlfriend. Kihyun enters as a part-time worker to earn money and find love. From the first day, he had a great encounter with Hyesol, a beautiful girl who treats him with kindness, but, the story changes when Kihyun is assigned as a janitor who works 24 hours a day. At the moment when he thought to quit because he had no friends and his relationship with Hyesol was not going the way he wanted, someone made him a proposal in front of his room…