this is amazing

I read this using machine translator so maybe i read something wrong but i love this novel.
the store owner is not a wimp like usual isekai protagonist (this novel is not isekai)
i think the author understood the essence of medieval world, and the fantasy aspect of that world is beautifully writen.
im surprised in good way that author written sun god is evil as sun is necessary for life.
it just the people in that world unusually smart?i dont understand how small tool shop owner understand economic country that much that he even teach a princess... maybe he learned it from his peddling?