Her walking away without explaining herself doesn't exactly earn her any points. It just reinforced what we've been shown about her before.I mean even if he won't forgive you I'd think he'd be owed at least an explanation as to why you abandoned him but I guess we're saving that plot point until later.
The manga already "kinda" ended with them getting married, and now it's back tracking to have them go through their dating phase.adding this kind of story just screams running out of ideas tbh.