Minju is Dokyeom's girl best friend. Hence, she be friend with almost all of Dokyeom's friends.
They met during first year in the university and just clicked with each other.
Minju and Dokyeom are like inseparable; they took the same course, club, and even join programs together.
Many people mistook that they are a lover. Well, they are not totally wrong but they are not right either.