The premise of the story is really great. Post apocalyptic setting with some aliens ? The description hints that the guy wants revenge above all, seems good right ?
Well, let's just say that reading this manhwa so far filled me with much more frustrations than excitement. I'm frustrated by his choice, his utter lack of resolve with his "revenge", the very slow pace of things (but that's a choice from author so can't do much about that), how they waste chapters on the backstory of the bullies (for real though, who cares about these animals)
Oh and one last thing, the "aliens", had they not been included in this manhwa the story wouldn't be any different. They are just .... there.... Sometimes they appear, but most of the time you'll forget about them if it wasn't for them appearing on the cover page at the beginning of a chapter....
Actually, saying that the aliens have no influence on the story might not be entirely right, as one could theoritize some juicy stuff regarding the mc and the leader of the scumbags.