Yes, I too, am in dire need of spoilers.
the mc returns to her original world then I think the ml got sad so asked the Demon king if there was a way for him to bring back the mc. The Demon king said (i think) that he would need to sacrifice a bunch of souls so the ml sacrificed some people (he probably sacrificed the criminals on death rows) After that, I believe she got back.
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(I don't know the details because I haven't read the story that far yet. I just saw some spoilers on the comments)
so he asked*
Anyone give me some spoilers