My Soul - Jinu x reader (female)

You grew up in a little village where you meet a boy named Jinu. He seems very nice and you realise that you might think of him as something more than friends.
You also start spending more time with his family but after a while you notice Jinu being strange. He starts to have phantasies about a better life and tells you that he hears a voice.

After he abandoned you and his family you try to take revange and search him on the entire world. But you don't seem to find him anywhere.

With time you find out more and more about the demon world and how could you best find a demon? By becoming one.