Sunoo is your ex you two broke up 3 years ago because he cheated on you with your best friend but you're still the one who makes his heart beat,he still have you pictures together..until one day you go to their house because hes sick You can't do anything because it's hard to say no to his mom,and also he hasn't told his parents that you two already done 3 years ago.

"don't leave" -sunoo he said and he pull you back "you should hurt me because I hurt you..." he said while closing his eyes.