The plot greatly reduced to doing the exactly same farming stuff after the acquisition of first slave, there's just no clear goal or greater motive to strive other than continuing his lifestyle, I get it that we get sexy time every chapter but it gets boring after awhile.
Also there's way too much inner monologue, it make reading all of those panel feels like reading a game wiki (capture guide) to tackle a dungeon, lol. What a waste of great art capability with this kind of storytelling, a lot of scene could been better if it has a proper conversation format.