I mean, he's already had a bit of a thought process of this... he has friends in the demon world, a family that loves him and will give him anything HE wants, and a satisfying school life where he isn't instantly being used by other students as an excuse to go do something else... The human...
Might be in the upper torso, which is where the spear BARELY missed.
Really, it's more annoying that the KOG is apparently STILL functional after losing over 50% of the mech.
We have no idea. However, the idea was that this wasn't supposed to be a passable event. Killing 100 mechs with a base model is meant to be impossible. MC essentially triggered a flag that wasn't supposed to be there in this timeline.
Unfortunately, that's also why it wasn't popular. It didn't copy/paste that formula, which people want more of. This series took a risk, and sadly failed.
It's currently a webtoon manhwa. Season 1 is done at 74 chapters.
You can find it under the titles, The Apothecary Prince, or The Crown Prince that Sells Medicine.
It's set around 300 years after Greatest Estate Developer.
He was not the one to kill them. He was unable to save them when the Big Bad Wolf guy went to try and see if there is more than one way to skin a tiger.
Could also just be a societal expectation and reality. There is technically nothing stopping them from killing each other, but demons and monsters remain so prominent that they just don't have time to even try, not unless they want to get overrun if they make the attempt.
I could actually buy the Yakuza dude surviving, albeit heavily injured, since he did actively use the bodies of three other people to protect him from it. Not much of an excuse for the little turd though.