he's closest to demiromantic but he's not demiromantic. reread the previous chapters, he said he has tried forming deeper bonds with a previous person but he didn't fall in love. if he is, the author is portraying it badly. there's no way out of this but accept this isn't the good place to find representation if you people want him to fall in love. the aromantic umbrella should have a reform im the first place. it accommodates too many varying definitions to the point it becomes useless and inconvenient to use the label.
but the thing is that he clearly said in previous chapters that he doesn't feel comfortable in creating romantic bonds, so i see that as "im 100% no romance kinda person"
ofc he could be an aromantic person and fall in love or even demiromantic like you said if he had said smth like "im not totally into romance, but i can still fall in love w someone", but he didn't say that. im just looking from what's been going on with the released chapters.
I dont know what i am but i was like this too. Never liked a single person in my life and even forced myself to since everyone else did.
It changed once i met my bf after a few months of speaking
Bro I literally used to think I was 100% romance repulsed. My point is he could still be demiromantic.
These are people on the aromantic spectrum that only feel romantic attraction after a strong connection has been made. I should know, I am demiromantic. I fell in love once so far and it was with a close friend. Fukami may not be 100% no romance aro but he could also be demi just as well. Either way he's still on the aromantic spectrum and it is erasure to deny that just because he ends up developing feelings at some point.