This is one of the most insane manga I've ever read. The tags and title do not do this thing justice. I genuinely think the mangaka wrote this in a psychiatric hospital
Almost all other characters in this manga are crazy, but I feel like they're manageable/describable, like the fmc who is just a soft yandere. But not the mmc. I spent 30 minutes trying to put the male mc's personality into words like "batshit insane" or "chaotic neutral" or "the joker but he doesn't kill people," but none of it truly represents this guy's character, you just have to experience it yourself.
The feeling this manga gives is like getting the rundown from your superior at your new job just to see an image of yourself in a frame captioned "employee of the month for the last 12 months."
It's like moving to a new city just for everybody to already know your name.
It's like coming home to your cabin in the woods to find that the front door is unlocked, but you're only 70% sure you locked it.