E1
63m
Ju-won, San-ha, and Hae-joon Meet
A family of three moves into the Oryun Mansion Complex, and Ju-won meets San-ha, the brother she always wanted, for the first time. Despite Ju-won's eager wish to get to know him, San-ha has trouble accepting her due to his family's situation. Meanwhile, San-ha's father meets Kang Seo-hyun, a single mother with a son named Hae-joon.
E2
68m
One Family Name
After growing up together as a family, Ju-won, San-ha, and Hae-joon go to high school together. San-ha and Hae-joon are hot with the girls, causing Ju-won to deal with the onslaught of requests from the girls to deliver their love message to them. Meanwhile, Ju-won longs to live under one family name through adoption, which the others think is absurd. Later, Hae-joon catches a suspicious man taking photos of him.
E3
62m
Two Fathers
A man visits Hae-joon at school and reveals that he is Hae-joon's birth father. Although Hae-joon is initially speechless, he feels relieved to learn that his father has not abandoned him. To find out more about his father, he and San-ha talk with Aunt Yi-hyun to gain insight into his father's character before meeting him in person and uncovering the reasons for his sudden return after all these years.
E4
61m
Next
An Unwelcome Visitor
Ju-won feels exhilarated about going on a date with a boy who is good-looking and smart, but she soon gets disappointed by what he says to her. San-ha and his father are upset by an unwelcome visitor who reminds San-ha of memories he doesn’t want to recall. A surprise present from Hae-joon’s biological father brings about a conflict between Hae-joon and his colleague.
E5
60m
Hae-joon’s Birthday
With Hae-joon’s birthday around the corner, San-ha and Hae-joon get into a big fight. To help them reconcile, Ju-won plans to take them to a rail bike. However, many misunderstandings develop as Ju-won collapses from a cold, and rumours between Dal and Hae-joon spread at the school. Meanwhile, everyone gets ready as Yi-hyun plans to join the birthday party.
E6
61m
Visit from Hae-joon’s Mom
Hae-joon’s mother, Seo-hyun, unexpectedly visits Yoon’s Kalguksu to repay her debt, leaving Jung Jae puzzled as to what to do with it. Meanwhile, So-hee goes missing after leaving home to meet San-ha. Her disappearance reignites the unresolved conflict between Moo-sung and Jeong-hee, resulting in San-ha's decision to distance himself from the family.
E7
63m
The Basketball Game
Hae-joon finds out that his mother had come to pay back her debt, but did not stay long enough to see him. After CSAT, misunderstandings between San-ha, Ju-won, Hae-joon, and Dal build up as they are clueless about each other’s true feelings. Meanwhile, Hae-joon’s birth father watches his son’s basketball game and suggests he study further in the US.
E8
62m
Leaving the Countryside
San-ha stays in Seoul to look after his step-sister while his mother recovers from surgery. Ju-won goes to Seoul alone to surprise him without telling the rest of the family. Meanwhile back at home, Jeong-jae collapses from overworking, scaring everyone, especially Hae-joon, who makes up his mind about going to the US.
E9
65m
A Decade Later
Ju-won is shocked to find out both San-ha and Hae-joon have made up their mind to leave for Seoul and the US. Feeling a part of the family will be missing, she can’t help but cry. Jeong -jae also feels bad sending the boys away and feels empty in heart. Ten years passed, San-ha and Hae-joon came back as two grown-ups.
E10
60m
Awkward Reunion
San-ha and Hae-joon come back on Ju-won’s birthday after ten years. Though they haven’t seen each other for years, unlike what Ju-won had imagined, she feels indifferent about their return and is not happy to see them. Meanwhile, the family finds out a shocking truth about Hae-joon at Ju-won’s birthday celebration.
E11
63m
San-ha’s Confession
San-ha’s sudden confession startles Ju-won. While she tries to deny any romance between them and stay as siblings, she is overcome with mixed feelings. Hae-joon jokingly suggests getting married to Ju-won, upsetting San-ha. Meanwhile, a surprise visit from Seo-hyun shocks Jeong-jae as an unexpected turn of events takes place.
E12
62m
A New Start
San-ha and Ju-won finally confirm their feelings for one another. However, they soon become worried about how to break the news to their family and friends. Meanwhile, Hae-joon tries to pay back Jeong-jae for everything he has done for him, but some misunderstandings develop as Hae-joon’s source of money is revealed.
E13
65m
San-ha Having Insomnia
Hae-joon finds out that San-ha is struggling with insomnia and taking medication. So-hui comes to visit San-ha alone without telling Jeong-hee and asks him to stay with her and Jeong-hee. Dal keeps trying to hide her feelings for Hae-joon. Meanwhile, a big secret between Ju-won and San-ha is about to be revealed by none other than Hae-joon.
E14
65m
Unchosen, Unloved, Alone
Hae-joon is filled with a deep sense of betrayal as he watches San-ha and Ju-won on the verge of kissing, struggling to understand how Ju-won could accept San-ha as a boyfriend. He’s haunted by the fear that, like everyone else before them, they too will eventually leave him. Meanwhile, though he knows where his mother is, Hae-joon watches her from a distance, and each glimpse only fuels his growing hatred for her.
E15
61m
San-ha Getting Hurt
Everyone is happy with San-ha and Ju-won dating, except one person. San Ha gets hurt and rushed to the emergency room and even Jeong-jae and Dae-uk hurriedly come to check on him. Hae-joon decides to play basketball again. Dal is deeply disappointed and devastated. Meanwhile, when Ju-won is alone at her bakery, an unwelcome visitor comes to see her.
E16
64m
Someone for Everyone
San-ha can't wait any longer. He approaches Jeong-jae and requests his approval to be with Ju-won. Ju-won and Hae-joon try to work some romantic magic between Jeong-jae and Seo-hyun while Dal goes on a blind date, as suggested by Jae-eun. However, Hae-joon doesn't like the idea and doesn't let his chance go. Meanwhile, Jeong-hee plans to move to the UK with So-hee.
