See, you found another reason to reuse same characters ;) solves corpse problem LOL

But either way if we consider dead bodies in that world, I would say they are just lying down on the ground making a mess for everyone like trash, unless somebody picks them and finds some use.
For this reason it is not allowed to kill yourself randomly unless there is some special event or place which sort of limits population decline LOL

One way to use those bodies would be to build something like house of horrors where they perfectly fit as decorations. Then girls can compete who of them will make more gruesome decoration, trying to die in most horrible wasy possible.

>Some get used for pleasure, as written in the last chapter.
Looks like that world has lots of necrophiles as well if they prefer dead bodies over live girls that are free to use.
so probably it would make sense for girlfriend to send her dead body as a gift to her boyfriend as the pretty much only wasy to have sex with him :)