Hyuntoru was your ex boyfriend. You two broke up because of a long distance relationship. Although, you still missed him

You went to the mall by yourself then you saw someone very familiar. But, you didn't remember who so you didn't care about it.

you suddenly remembered who he was. It was your ex, hyu. You really missed him.

as you were about to approach him, you saw another girl beside him. The both looked so happy together that you eventually got jealous.