I love how the synopsis says she is supposed to be a support character while being totally presented as a main lead. Good job writers.

From the beginning of this 1st episode I could foresee anything this drama held for its own future. A total bundle and collection of all possible cliches you can find in any set-in-school romance stories whereas you have this supposedly support..oops, I mean main female lead who is supposed to be the support lead (then who tf is the main lead?) acting like it's the end of the world for her just because a lot of confusing and magical things happen to her EVEN THOUGH SHE IS SUPPOSED TO BE THE SUPPORT CHARACTER XD.
I mean, I only watched 30 minutes of this and saw through every single line...plus the cringe set up for a youthful school romance love triangle or whatever reverse harem.
Everything is stereotypical. "Badass" and "attractive" male students walk up the hallway?! Check -> Have all side characters act like NPCs and drool over them or make way for them while another irrelevant NPC crashes with one of them.
Want to make female lead seem relevant even though she is supposed to be irrelevant since she is a support lead?! CHECK -> Make her have a heart disease plus a one-sided crush with one of the male leads.
Everything just comes back to that damn synopsis. She is a support character that fights over her fate to become a main one? MAKE HER LOOK AND BEHAVE SO or at least make it interesting you buffalos.
Only dull and over-the-top kdrama fans will give this an above average rating. Truly sad.

My judgement for this drama is.......0! I give this a 0/10.