pg-13, ~4600 words.

a/n:

this is supposed to be highschool!au. and it accidentally turned out to be quite angsty??

this is also my first exo fic, my first fic in about 4 years and my second fic ever, so i don't know what i'm doing and this probably . please note that english is not my first language and excuse my awkward wording and probably many mistakes. 

title taken from the english translation of SHINee's Symptoms.