Dad
Choi Mal-Chin
His name means "persists to the end"
His name describes him so well. After his wife's death, he learned how to move on and continue to be the best father for his four kids. He never really failed as a father. Sure he lost Jeongsan at the park one day. He found him though. Sooyoung's father is the nicest man anyone will ever meet. He was able to raise 4 kids on his own and has remained humble along the way. All of his children treat him with the upmost respect as he deserved but they are all able to hang around as if they are the best of friends.
Choi Min-Jun
Age: 30
Min-Jun is the oldest out of all of the kids. He definitely acts like the oldest. He tends to be a bit overprotective and mean when he needs to be. When Soo-young had a crush on a boy, he threatened the boy to stay away from her and the kid did so. Soo-young was sad about it as she didn't understand what was going on. Min-jun as the caring older brother he is, comforted her and told her that boys are not worth her time. Of course he was proud of himself.
Choi Kyong
Age: 28
Kyong is definitely one of the nicest. He is a super cute kid blessed with a baby face. He is able to get all the guys. Ah yes. Kyong likes men. Before he came out, he was really shy and quiet. After getting the support from his family and friends, he became a party animal but still the nicest person you will ever meet. If you ever need advice on something, Kyong is the one to talk to. Soo-young didn't know what to do about the boy that ditched her so Kyong gave her some advice and let's just say that she thrived after that talk.
Choi Jeongsan
Age: 25
Jeongsan is the older annoying twin that Soo-young never wanted. He is like Jungkook in some ways. He loves video games and actually has been succeeding in becoming a pro gamer. He does English commentary on the games that he plays on YouTube. His videos are actually pretty entertaining to watch. He also never fails to bring up his famous sister. Probably for more views. But in one video, he made an analogy to the game relating to that one boy problem Sooyoung had. Let's just say that Min-jun had to endure a very long lecture from Sooyoung.