Is time travel good?
Bunyan: I want to go home. I'm just a college student. Wouldn't it be great to have takeout delivered via mobile phone? Okay, I've worn it all, I admit it, but why the Western background? There is a language barrier. I was captured as a slave as soon as someone discovered that I looked different.
After I got the language proficient, hey, this world seemed like a time-travel novel with a western fictional background that I had read. I wanted to hug the protagonist's lap...
Ah, the protagonist hasn't been born yet?
Oh, the villain BOSS has been born. I'm going to hug the BOSS' thigh.
Damn it, BOSS, why are you, a native, more like a time traveler than me?
Having read many novels about time-traveling halos that illuminate all living beings, and also some novels about indigenous people fighting against time-travelers, the author wanted to write something different.
Purpose: What the indigenous people lack is the knowledge accumulated over time, not brains