Hmmm the part about "it's my fault for not treating her well" is what made all he said kinda bad. That really wasn't related to the point. It's not his fault if the girl that was only interested in using him stayed that way even if he treated her well, since she's uh, using him? Not seeing him...
@Georg Ooh, that's true. Wonder if MC is going to think like that. Hopefully he just doesn't cope out saying "Well I'm just happy she's with me" or whatever.
Ok MC, don't get your hopes up. She's using you because she knows about your weird unlimited potential. Please get back on track. This remembers me of some NTR blackmail stuff, so please stop.
Guys, stop trying to compare this to the real world. The interactions on Isekai manga are all fucked and made up for wish-fulfillment. You can't just simply compare them since they don't really follow a good logic anyways. If she was a slave or not she's be all on the MC's dick for one contrived...
C'mon guys, this is a masterpiece. You just don't understand the nuances of the characters and think everything needs to be thrown at your face for you to get it. Hmm, obviously.
Hopefully this is only one case of stupid situations for stupid reasons happening. "Yeah, kissing a married girl because you confused reality for a game how dumb!". This makes my expectations really low.