Dude, the story changes in such a psychedelic way that thinking the author took drugs or went crazy is quite plausible, bordering on certainty because holy shit, the change was extreme in terms of story, direction, even some pages of his art are of very low quality and even the characters' personalities as a whole, even their goals, go to waste. The author just didn't give a damn about anything, from chapter 40 onwards it becomes a completely different and extremely boring work to follow, and that is absolutely, holy shit. Something really big happened to this author, and it was absolutely not good for his work, I can say that for sure, the change was from gold to complete shit.