A slacker System accidentally takes over its Host's body. Now it has to help the Host return to her original body while also watching out for the possessive male lead's schemes against her.
All because it gave her a universally-hated buff to make things difficult for the Host: everyone around the heroine would instinctively loathe her.
After disrupting the original plot, she escapes the manor and sets out on a demon-hunting journey to restore the Host to her true form.
Demons love deeply, and the System gradually develops the six senses of a human. Fragments of memories begin to surface.
Behind the veil of conspiracy, a pawn caught up in the storm slowly becomes the one moving the pieces.
Theme: Uphold justice, punish evil, and promote goodness.
It's great, can't wait for the next chapter!