O Sol starts working as a Cleaning Fairy and continues walking down crossed paths with Seon Kyeol. Work isn't easy at all but she learns quickly on how to take pride and love her job no matter what.
O Sol learns that Choi Ha In is a renowned doctor, not an unemployed guy living on the rooftop of her house. Choi Ha In tells O Sol his feelings for her, saying he moved to the rooftop to become closer to her.
After O Sol's abrupt kiss, Seon Kyeol faints and wakes up at a hospital. He learns that his fainting incident was caused due to a psychological stress after having physical contact with someone as an OCD patient.
Seon Kyeol is back from the States after two years since their break up. O Sol is now working at a sport's agency, Jae Min is a actor, while Yeong Sik and Dong Hyeon are each making a living by teaching Taekwondo and delivering packages.
Ms. Kwon shares a secretive deal to O Sol. She offers O Sol to work as Seon Kyeol's live-in housekeeper as an attempt to help Seon Kyeol overcome his Mysophobia.
Seon Kyeol has a weird feeling towards O Sol after knowing that she is the only one who he can get contact with. The more he tries to get rid of O Sol, the more he cares about her.
Seon Kyeol finds out that O Sol's mother died from an accident caused by his grandfather's company, AG Group. He also finds out what went behind O Dol's disciplinary committee.
It hasn't been long since O Sol stayed with Seon Kyeol, but Seon Kyeol already shared his feelings toward O Sol. For O Dol however, O Sol hides her romantic feelings and pretend to not like Seon Kyeol.
Things between Seon Kyeol and O Sol couldn't get any better, bad news greet the family after O Dol's disciplinary hearing. O Dol is left with a one-year suspension and they find out it has to do with AG group, with Seon Kyeol.
O Sol and Seon Kyeol discuss what had transpired the previous day. Against O Sol's request, Seon Kyeol is reluctant to explain his actions while telling her that he has no desire to begin another relationship.