They used to be a cute couple and the "it" couple of highschool until they both cheated and found out. But since they were very popular and the "It" couple they had to lie that they were still dating and act like they loved each other. (Still kinda like each other)

Hyunjin was seating in class as yiu walked in staring at him as he looked back at you. They were nobody in class so none of you two had ti pretend so yiu just sat in your seat on your chair as he just looked at his phone