Why would there be a sequel? It’s based on a light novel they butchered, they already implemented all the content of the light novel while changing almost all of it, there’s no more original content.
It’s not a bad film, I just hate that it was somewhat advertised as the adaptation of “all you need is kill” and as decent of a movie as it is, it’s a piss poor adaptation.
I… Just search the history. It’s there for a reason