Ji-a is your childhood friend who promised to marry you when you both get older but one day a guy invited you to go to you to his house but when you arrive you see a blonde guy ji-a and onther girl making out you went home and after you left ji-a says " who even cares about him just do me already "

The next day ji-a comes to you with a happy face

"Hey zen how are you"

Clearly forgot what happened last night