Demon Slayer: Even in Reality, I Have to Show My True Abilities

Ghosts are creatures that should not exist in the real world. Due to an experiment, they suddenly came to reality. However, they came to reality in a different way. They came to reality by changing their bodies with humans. And I was also involved in this accident. How can I save this world? I don't know! I really hope that this kind of thing will end soon. Hmm, boy, merge with me! Go save your world! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.