Toxic josei with manipulative ml that i actually like

A girl is haunted by the “ghost” of his obsessive, psychopathic childhood friend in a different name in a series of “coincidences” that tangles them together.

A girl and an otherworldly being get tangled up together when she accidentally woke him up from his “eternal sleep”. Their relationship morphed from wholesomeness into one where he completely dehumanizes her and takes her as a pet/possession, continuously manipulating her environment to the point of complete mind break.

Here, humans are born with inherent traits. A girl who’s a “shut”, whomst they devote their entire live loving their mate, moves to the other side of the world in order to chase her mate. Her seemingly “less” (born with no trait) mate hides a dark secret behind his cold demeanor.