I think the author is just trying really hard not to go down the Fantasy route too hard, and tries to steer clear of it as much as possible.
I mean, I can already see this manga turning into a cultivation, xianxia story, in which the MC has to train and earn techniques -- otherwise, the evil greedy bad guy person will destroy him! etc. You get the idea.
Honestly, I don't expect much from this story. But considering the levels of garbage we get from Asia on a consistent basis, this one did not hit the shitter just yet.
P.S:
@Teney
I'm not too sure what that guy meant by "the MC is totally naive", but I gotta say at least one thing regarding what you wrote about the army.
Even if every single "retard" is conscripted, the mere fact that you have to share a room with them, under military discipline, for a few years, is going to be something that'd change you. It doesn't quite matter what you do there, the social interactions you have in such an environment is abnormal enough to encourage enough changes to your personality, for better or worse.