And MC didn't explain to her how incrediby dangerous that sword is, even though they looked like friends? What the heck? And he even showed an interest in selling it, however brief it was, to the merchant girl?
I would blame him 100% if the girl ended up harmed in any way because of this.
That being said, this looks incredibly derivative. As in a collection of tropes slotted into a ”story”. Guaranteed there will be no mystery anyone can’t solve before the next chapters. And the chopped up chapters will annoy people far before they realize how boring the story is.
Theres also no shot that the mystery behind this sword will be compelling.