Haiz, aigoo, mou, the language is all over the place. Can't we just stick with one? Even better, just use plain English.
That said, it really looks like the MC and the princess are meant for each other. I think their interactions can be fun. Kinda disappointed there's a harem tag.
Judging by WHY they absolutely hate heroes, which is pretty reasonable, doing anything (albeit it's too late for that) is absolutely not a thing to do.
Unless he will pull a redo and mindcontrol the princess instead getting on her good side.