After spending the night at a friend’s place, Lee Jeong-in goes to the pharmacy, where she realizes she doesn’t have her wallet -- and meets Yu Ji-ho.
Jeong-in is surprised to see Ji-ho at an unexpected setting. While orbiting around each other, the two of them discuss whether to be friends.
Ji-ho becomes contemplative after Kwon Gi-seok’s sudden visit to the pharmacy. Jeong-in’s friends and family notice something different about her.
Jeong-in and Ji-ho attempt to navigate their situation, as talk of marriage grows around her. Ji-ho’s basketball match with Gi-seok gets intense.
Jeong-in has a candid conversation with Ji-ho about what they want from each other, but when she seeks advice from others, things get more clouded.
An unwanted visitor interrupts the impromptu get-together at Jeong-in’s place. Ji-ho is put on the spot. Eun-u’s grandmother asks about the teacher.
Gi-seok doesn’t seem to understand what Jeong-in wants, and she decides to meet his father by herself. Ji-ho makes an abrupt confession to his friends.
Jeong-in’s outward conviction wavers as she deals with other people’s opinions. Ji-ho wonders what’s best for Eun-u and whether to move forward.
Jeong-in and Ji-ho face tough questions and contend with the reactions of those around them, as they find that their situation is not just about them.
Jeong-in and Ji-ho unexpectedly run into Gi-seok, who’s determined to get his way. Lee Tae-hak learns something distressing from Kwon Yeong-guk.
Jeong-in is taken aback by Tae-hak’s presumptions. Lee Seo-in reveals the truth to her mother. Ji-ho has a frank chat with Lee Jae-in about her sister.
Ji-ho asks whether Jeong-in would like to meet his parents. Gi-seok’s complacency doesn’t wane. Seo-in’s announcement has mixed consequences.
Jeong-in pleads with her mother. Gi-seok’s stifling tactics intensify and he turns to Yeong-guk for help. Ji-ho and Eun-u spend the day with Jeong-in.
Jeong-in faces off with Tae-hak, who’s unrelenting, and later asks Yeong-guk a pointed question in front of Gi-seok. Seo-in and Jae-in talk to a lawyer.
Jeong-in gets upset about Ji-ho’s past and questions what this says about her. Gi-seok thinks he sees an opportunity and shamelessly contacts Tae-hak.
Gi-seok baffles Yeong-guk and Tae-hak by insisting that he’s going to marry Jeong-in. Sin Hyeong-seon wants to see Ji-ho, who brings Eun-u with him.