Kim Yoonjung started her own babysitting business after finally moving out from her parent's house. She rented an apartment in the city. However for the past 6 months, the only kids that she has been babysitting belonged to a single father of her former high school senior Park Chanyeol, which also happened to be her neighbour. She couldn't believe that the guy she used to have a crush on was her employer. Of course, being 2 years his junior, she never got the chance to tell him how she felt. Could her second encounter with him a sign from the universe that is giving her a second chance?