If this was more generic garbage drama, Nan Zhi would break the relationship for the "good" of Qin Mi so she can follow her dream, good thing it's not the case here, rarely that kind of plot is executed well since vast majority of times it doesn't make sense and have bullshit justification.
It's also nice seeing adult characters acting mature, Nancy probably was indeed poking Nan Zhi over Qin Mi quitting, but instead of taking it personally Nan Zhi actually accepts she has a point and instead try to support Qin Mi so she can get back to it.
It sure makes a difference when the story doesn't depend on forced drama