Nae Ireumeul Bulleojwo!

I can be a main character too! A-Reum Han, an extra in the fictional world she inhabits, knows her role by heart — from gossiping in the cafeteria to picking on the female lead. But slipping on the stairs? That wasn't in the script! It's no ordinary fall either because she tumbles out of the pages... into the real world! (Source: Manta)