This manga is a little strange, heavy spoiler here, i won't be marking because its everything, to start of his gimmick is only reveled after some time, he was an engineer, but the only thing he did was a plane and some guns, he has the power to make anything and all he did has some guns that work withouth gunpowder and a "plane", but tha isn't the main gimmick and the fact he is an engineer is never brought up again,no, the main gimmick of the whole story is romance, it isn't saving his mother, because we know very little about her, she really just exist to be saved and be a sholder to the mc, he love this girl that was the villanes, and he wants to save her from being gang raped, if what i said sonded out of place is because it is, rape is trown at your face here for no reason or warning, i lie actually, the only reason rape is thrown here is to justify the protagonists action, he is conflict about killing, well they aren't real humans they just pretend they are, and you may think this is a bit harsh, but here is a scene of the bandits raping this kid, now they are properly uredeemable, what about the kid, she must be scared mentally for life, well fuck them lets go back to whatever bullshit we where doing, after that is a very poor romance, i didn't really feel a very strong conncetion bettwen them, she is apparently strong and tallented, but in two times they have been together fighting the mc carried her so easily, and then there is the concept of levels and this shit, it isn't even half baked, you forgot the eggs and the oven is cold, many things here seems to be but in place to explain without explaining, how is the mc so strong? He leveled up, how much is his level? Don't worry about it.
Having said that, its ok, the writting is poor but if you're hungry for something you can't complain about taste, 6/10