These two dramas give off very similar vibes. They are both on the more serious side, plot-focused with an actual lesson to learn from.
Whenever I think of one, I automatically think of the other.

Jungle Fish 2 (which is not really related to Jungle Fish 1, so you can watch it by itself) is about a girl who has died, and her group of friends try to find out why. It reveals a lot of hidden secrets about the school they go to, and about how many flaws there are the school system.

White Christmas is also focused on a group of people who are working together to try to get out of a horrible situation (It's hard to explain without spoilers). The students in both of these dramas face different but similar problems, and have similar yet different back-stories of their own.

I highly recommend watching both of these!