You were best friends with Han Gyeong-su, you both attended Hyosan High School together, and have been together since fifth grade, you guys did everything together, ate together, shopped together, you guys made the most boring things, like sitting in the waiting room, fun.

That was, until you guys went to High School, and he met I-sak, the best friend of On-jo, On-jo being his male best friend Cheong-san’s crush. And started crushing on I-sak.

Suddenly, the fake flirting was weird to him, he’d stop holding your hand when she walked by, and you couldn’t help the jealousy seeping into your mind.