In Eternity For Exchange

Demons were born thousands to almost a million years ago. Humanity stands as the last wall to protect the innocents. Meet Fu Yusha, a young boy from a small who wants to remove the demons roaming the world from existance.

This story is inspired by Demon slayer. Some later chapters may reflect the scenes from the infinity castle arc. Author will give a note at the start of a chapter if there is. All things, dates and events that happens in this story is purely fiction and will not line up with the events of the real world, any events happened in the real world is pure coincidence.
The author is not a medical student so any medical terms or conditions may not be accurate.