Chang-soo’s mother finds out that Chang-soo is still dating Ji-yi. She tries to evict Ji-yi from her home and asks Chang-soo if he likes seeing Ji-yi suffer. He has nothing to say and promises that he won’t see her again. Ji-yi plucks up the courage to call Chang-soo’s mother to tell her that she got a job. After that, she sends a message to Chang-soo that says she’s going back to reality. Ji-yi is cheerful when she meets Chang-soo’s mother. She tells her that she won’t be meeting Chang-soo anymore and asks her not to come looking for her again, as she might start to like her. Ji-yi then wishes her well and leaves.
Meanwhile, Joon-ki and Ji-yi are getting closer since they are both working in Taejin and come from a similar background. They share understanding and kinship to each other, and become friends. Joon-ki becomes her emotional support and he’s the only one she can turn to. Ji-yi invites Joon-ki out to lunch in gratitude for being her support system. Ji-yi is determined to cheer him up from his dejected mood relating to Yoon-ha.
Ji-yi and Chang-soo’s relationship is getting worse. Ji-yi knows that the only way to resolve their difference in social status would be for one to be reborn into the other’s class. Chang-soo returns home, drunk, and tears up his room before his mother comes in. In tears, he says that he is really losing his mind. He crumples to the couch and sobs that he can’t live without Ji-yi and that he doesn’t want to live, if that’s his future. Chang-soo’s mother grows more concerned with Chang-soo’s suicidal talk.
The next day, Chang-soo comes home extremely drunk for the second time, and tells his mother that she should remember that he chose her over Ji-yi. That doesn’t make his mother feel any better, and she just makes things worse when she reassures her son that he can have anything he wants. Chang-soo asks if he can have Lee Ji-yi, and then begs his mother to let him have Lee Ji-yi, too, before promptly passing out.
As for Yoon-ha, she is still giving Joon-ki the cold shoulder and hasn’t moved on, as she still questions his motives in the past. Joon-ki feels guilty about his deceit and lets Yoon-ha vent her anger toward him. At their place of employment, Joon-ki helps Yoon-ha by finishing a lot of her work for her. Joon-ki admits that he was wrong. Likewise, Yoon-ha admits that she acted childishly with her whole revenge scheme against him. Their relationship is improving.
Yoon-ha is motivated to beat her older sister and to prove her skill by beating her sister’s sales records. She calls Joon-ki and says that she decided to live in the reality she was born into and she wants to come out on top, even though she doesn’t know how to deal with working with other people. She asks for Joon-ki’s help in that regard and Joon-ki agrees. While doing the promotional video, Yoon-ha and Joon-ki speak freely with each other again and it reminds them of when they were first dating.
Meanwhile, Chang-soo’s mother meets Ji-yi again and lets her know that she can see Chang-soo again, but that doesn’t mean she approves of them getting married. However, Ji-yi says that she won’t get back together with Chang-soo. Just as Chang-soo’s mother would never approve of their union, neither would Ji-yi pursue a marriage that was opposed by her fiancé’s family. Knowing that his mother came to see Ji-yi, Chang-soo asks Ji-yi to meet. Chang-soo offered to meet her at her level and move to her neighborhood. But Ji-yi still holds fast to the idea that she won’t marry into a family that opposes their marriage.
Joon-ki refuses Yoon-ha’s sister’s request to help her oust Yoon-ha from the company and hands in his resignation. Sometime later, Yoon-ha drops by her sister’s office to boast about her sales records, which are higher than her sister’s, but her sister knows that Yoon-ha didn’t do it on her own and tells her that Joon-ki just quit the company.
Shocked by the news, Yoon-ha runs back to Joon-ki’s desk, only to find it empty. She calls him to ask if he really quit the company. She doesn’t understand how he, of all people, could quit, wasn’t making money more important to him than anything? Joon-ki admits that despite telling her he was sorry for what he did and that he was wrong, he was never punished for his misdeeds. He decided to exact that punishment himself and complete the circle. Joon-ki asks Yoon-ha to not meet him anymore and not to call, either. He hangs up with tears in his eyes, and Yoon-ha’s left stunned.
Meanwhile, Chang-soo sits his mother down to tell her that he’s going to marry Ji-yi and says that he wants to be a man with responsibility. Since Ji-yi won’t marry someone whose family doesn’t approve, she and his father have to approve their relationship. Chang-soo tells her mother that he doesn’t want to be separated from either his mother or Ji-yi.
Chang-soo’s mother meets with Ji-yi and says that she won’t oppose the marriage. She openly admits she feels like she’s somehow lost to her. Ji-yi replies that she was the one defeated by his mother, so she will meet with Chang-soo again. Ji-yi comes home to find Chang-soo is waiting for her on her rooftop. Chang-soo says that he wants to live with her and asks if she will live with him. Ji-yi says yes without hesitation, and the two jubilant lovebirds embrace with huge smiles on their faces.
Yoon-ha waits for Joon-ki in his apartment lobby and they go out to dinner. Yoon-ha grills him over his recent decision to quit and her sister’s plans. She was also curious about why he came to work at Taejin, and Joon-ki sheepishly admits that it was because of her. He adds that it was because he missed her. However, Joon-ki stops Yoon-ha for trying to understand his actions toward her and asks her to throw him away, instead. Yoon-ha jokingly replies that she never said she was going to take him back, but she wanted to know when he started to love her for real in the midst of their fake relationship.
Joon-ki takes her to the elevator in the hotel where she had her blind date with Chang-soo. Joon-ki says that it was from the moment he first saw her. Then he turns to Yoon-ha and says that he loves her. Yoon-ha replies that she doesn’t believe in fate, so she will make a choice and she choose Joon-ki. They kiss just as the elevator doors close.
A year later, Yoon-ha is a director at Taejin. She meets up with a very pregnant Ji-yi, her husband Chang-soo, and her lover Joon-ki, at the same villa where they used to visit together. Ji-yi asks if Yoon-ha’s going to get married. She says that she likes being married, even though it’s hard living up to the expectations set by Chang-soo’s mother. More than anything, she likes living with Chang-soo. Chang-soo has a childish grin on his face and says that he likes it too.
Joon-ki then pulls out a ring box with matching wedding bands and asks Yoon-ha if she will marry him. Yoon-ha says that there should be a declaration of love with a proposal, which Ji-yi backs her on. Joon-ki amends his earlier statement and says that he loves her and asks if she will marry him. Yoon-ha takes the box in her hands, smiles, and tells Joon-ki that the ring is pretty, as a yes.