I just reread the previous chapters, and I still wasn't prepared for that last minute swerve. Two twists in one chapter.
Uncle seriously needs some therapy. He can't relate to people at all without video games. Did he only take the hero's role in the other world because that's what he'd do in a video game? Had he not been sent to that other world he'd most likely be homeless at this point. Hell, he'd still be struggling even with all his supernatural strength if his nephew didn't step in.
Oh, man, this is like a psychological thriller. I'm very invested in finding out all the flags Uncle trampled on because of his piss poor social skills and how he got to this point in the first place.