It's weird.
There was the set up for an interesting plot with the one girl finding his brother's core, but that seams to have been dropped (for now).
Right now the story feels like it's trying to be an improve the demon's quality of life/build friendly relations with humans story. But the...
Thanks for the translation.
It's comprehensible enough to understand what's going on, but I'd recommend using a little more than 10% human mind to go over and smooth the machine translation.
@ShionSinX I think the money thing is something to do with the master-apprentice relationship. Something like a graduation gift the master gives the apprentice when they finish their apprenticeship. MC just quit before the boss could give it to him/before he finished the apprenticeship.