I subtly think that there are some strong demons who were actually able to get through the door and cause havoc in the human world without anyone realizing. It was hell for Iruma back then, but the world he lives in now gives him so much more comfort. But just imagine it, a strong demon lurking in the human world. I know they exist, but imagining it again really makes me uncomfortably curious. Human desires are basically food to them. Just how strong they'll ended up with if they go to the human world.
I subtly think that there are some strong demons who were actually able to get through the door and cause havoc in the human world without anyone realizing. It was hell for Iruma back then, but the world he lives in now gives him so much more comfort. But just imagine it, a strong demon lurking in the human world. I know they exist, but imagining it again really makes me uncomfortably curious. Human desires are basically food to them. Just how strong they'll ended up with if they go to the human world.