Seon Kyeol is good-looking and successful, running his own company that offers cleaning services but his obsession about cleanliness is like an otherworldly thing that most people can never understand. O Sol is in her early 20s and has a rather quirky personality, but she does everything she can to pick herself up to find a job that can sustain her and her family. Although the two seem to be polar opposites on the outside, they both live each day with their own sufferings and concerns. Over time, the two learn to overcome their differences and understand each other’s pain.