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Da Young started work at a late age. It’s hard for her to make a living by working as an intern and handling her debts. However, the house helper that works next door, Ji Woon, keeps annoying her. The relationship between Da Young and Ji Woon begins.
Da Young has a tough time at work. She tries her best in everything, but her coworkers act like they desperately need her only when they have something in need and completely ignore her otherwise. After hearing hurtful things after a company dinner, she picks up a Life Line phone.
Da Young happens to go to the police station, so she has no choice but to ask Ji Woon for help. Sang A keeps contacting her boyfriend, but it’s hard to hear his response. So Mi looks for a room to rent and, in the meantime, Da Young rents out one of the rooms in her house to help her pay back her loan.
Hye Joo requests Ji Woon, the house helper, to clean up Sang A’s place. While Ji Woon and Sang A clean up together, Sang A determines to stop holding on to Yong Joon. Da Young realizes that she needs to clean the house for people to rent the room. She wants to ask Ji Woon for help but hesitates to talk to him.
Ji Woon takes a look around Da Young’s house and sees how much care has been put into building the house. He tells her to clean up her own room. Da Young, Sang A and So Mi end up living together under the same roof. The three of them have a lot to catch up on.
While working at home, Sang A hurts herself. Everyone else is out working, so Ji Woon ends up taking her to the hospital. However, she asks him for another favor after realizing that she needs to attend an engagement party thrown by a friend from elementary school.
An unfortunate incident occurs at the engagement party and Sang A’s jacket gets ruined. Jin Kook gives her his business card, promising her compensation for the jacket. Meanwhile, Da Young is running an errand for her boss at work.
Da Young is devastated, thinking that Ji Woon threw the kindergarten ticket away. Tae Soo stops by So Mi’s nail salon and scares away a drunk passerby who starts harassing her. Meanwhile, the important presentation is coming up for Da Young.
Ji Woon takes Da Young to the hospital. Sang A hides her true background and goes for a dinner with Jin Kook. Jin Kook tries his best to look good at Sang A. Da Young finishes her advertisement presentation and goes to see Ji Woon.
Ji Woon agrees to be a model for advertisement at Da Young’s company. Da Young coworkers hate Da Young as she’s only an intern but makes great progress. Sang A gets surprised as she finds out Hye Joo’s relationship with Chul Soo
Hye Joo gets upset at liking Chul Soo. Jin Kook tries to find a way to contact Sang A and decides to ask Tae Hee for help. Sang A begins to think about Jin Kook. She seems to wonder if he’s really into her. Da Young finds out Ji Woon’s birthday from the application.
Ji Woon starts shooting for the commercial. However, once the shooting ends, the client’s child goes missing. Da Young and her friends decide to cook a birthday meal for Ji Woon, but Hye Joo disagrees with them. Da Young starts to have weird feeling towards Ji Woon.
In his dream, Ji Woon sees the woman he misses. Without realizing, he kisses Da Young in his sleep. Although Ji Woon has no idea, Da Young can’t stop thinking about it. Meanwhile, Da Young has another bad day at work.
Jin Kook persistently shows his interest in Sang A. Thinking that he’s doing it for the sake of their mutual friend, Sang A rejects him. Meanwhile, Da Young and Ji Woon accompany Jin Hong for the project she’s working on. While doing so, Da Young discovers a secret about her boss.
Ji Woon gives Da Young his number in case she needs to contact him regarding work. She slowly realizes that she has feelings for him. Meanwhile, Da Young is in need of urgent help and calls Ji Woon.
Da Young’s colleagues start talking behind her back about her suspicious relationship with Ji Woon. Sang A finally gives Jin Kook a chance and decides to have dinner with him. Running out of time, Sang A asks Ji Woon for help with making the jewelry.
A company dinner with a client gets scheduled thanks to the success of the house helper project. Ji Woon agrees to join as well. While Sang A is having dinner with Jin Kook, her friends advise her to tell him the truth.
Sang A and Ji Woon find the man they were looking for and hear him out. However, there is no solution to the situation Sang A is in just yet. Meanwhile, at the team dinner, Da Young gets into an unexpected situation.
Jin Hong hands in her resignation in the fallout of the incident. Da Young feels sorry and promises to help her. Meanwhile, Sang A is back in Seoul with a difficult task left to do. She goes to Jin Kook for help.
Everyone brainstorms together and tries to find a solution to Da Young’s problem. Da Young and Ji Woon finally talk about the kiss and Ji Woon tells her a story of his own.
