So her love life, a car accident, and foreshadowing that it turns out very badly. I’m guessing that the male lead gets hit by a car, possibly pushing Dan-I out of the way, and confesses to her. Or depending on how dark we’re getting it could be that one of the boys who isn’t end game who confesses, then dies.
Orrrr if we get convoluted it could be that one love interest hits another with his car. Maybe that’s what all the new characters are for lol.