Female lead chooses the other guy over male lead in the beginning...

Then they don't see each other for years. The female lead is with the other guy who's an asshole. Eventually they meet again and she realizes her love for the male lead and breaks it off with the other guy.

 Czakhareina:

In Time With You

Delightful girl chunhyang but does it count if she choose the other guy because she was blackmailed

My Sunshine

Seen them, but thanks.

Scarlet heart Ryeo

Bu Bu jing qing

Dream high