Ikr, she's not even really part of the family, she's just adopted because she got potential that obviously went up to her head. Probably why she's so insecure towards him.
It's so sweet that Junghoon and Eunyoung showed up to act as his family. I hope they stay an active part of Youngjin's life! Make them the adopted grandparents!
I think the ML is his first love. The have the same first name. The different last names might be due to his parents divorcing. He really glowed up if he is
Now that you've gotten your ass beaten, please leave MC and this story alone.
Ikr, she's not even really part of the family, she's just adopted because she got potential that obviously went up to her head. Probably why she's so insecure towards him.