"Roll over and die" genres

well... looks like some people see magic as sci-fi xD

I know the thread is a few months old.
(Spoiler for Volume 4)
The "fantasy" world is post-apocalyptic earth and at least "god" is an artificial creation by scientists - maybe even the whole "magic" system.
So calling it sci-fi is fitting, but I wouldn't use it because it's a spoiler.