The number of fantasy elements is pretty absurd. It's hard to follow and it doesn't add anything. The world doesn't feel cohesive and practically anything could happen. The one thing outside the system is the mc's ability. I love that he's such an enigma, but it also makes it ridiculously unreasonable for anyone to even plan to kill him due to how unknown and far reaching he is. Anything that doesn't involve the mc is just a "why" thing to me, like the progress through the devil place and the android's killing spree. Really, what is even the point of hiding his abilities? He should just clear the place and meet with the sage.