Wow. This is kind of a weird Otome template to isekai into.
How do I put it? Usually, the heroine is a two-faced bitch and the stolen love interest is an unfaithful idiot. That's still kinda the case, but at the same time, it seems the original story never framed the heroine as anything but morally grey and shrewd, while the love interest breaking off the engagement feels more...amicable?
Like...heroes and heroines that are pragmatic scoundrels can make really good stories, and usually the condemnation event is more...callous than this.
Anyway, I'm in because I'm an Otome isekai addict.