"For now I was thinking I'll take it easy and spend my time leisurely"
And support himself how? He doesn't have money, a home, a job. He wants to not only live leisurely but also support a second person?
Guaranteed, he will come across an overly convienient way to make money and find a roof...
I don't see why she needed to be from a prophesy in order for 'nobles oblige' to copy a skill from her. The maid he first had sex with wasn't from a prophesy since he didn't have the prophesy skill yet. And the skill 'equivalent exchange' he got from the traveling entertainter', and she wasn't...
Thanks for your hard work on the translation. I didn't notice anything wrong with placement of the 'Boom", so if you don't have a better option this is a perfectly valid one.
And concerning the manga itself, honestly I have no clue who's who here. So I'll probebly have to start this one again...
I suppose he would fill the roll of combat engineer. I personally would have him tunnel into the base, but with how they possitioned the troops it seems that they will use the one side to distract, and then the other side, with kousuke, will have him make a hole in the wall.