professors by day, brothers by fate

Jungkook:" You're taking it so lightly cause you don't know how much we loved mom. We can never replace her. NEVER"
Yn:" The problem is that you're taking it as a replacement. It's just a new opportunity to have some happy moments. And believe me when I say I know how much it's hard to lose your mother."
Namjoon:" What do you mean?"

Well, what do you think she meant?
A girl who barely interacts with people is now a member of a family with 7 brothers.
But there are a lot of unsolved complexes in the middle.
After all, they are her professors.