Did you get the story? It's twisted, yes, but not toxic. He actually treats her really well and there was just a reveal explaining why the ML is how he is:
Spoiler
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!He's the same as her, he remembers his past life where he served Michael and was tortured by the crown princess!
All the insanity (gore and them covered in blood/about to fuck next to Michael's corpse) is because he drove both to insanity in their last lives and they both would give anything to get revenge on the people who harmed them. ML really did fall for the MC
Dark but doesnt mean toxic tho. They are actually good to each other they just have...different tastes from other cps jdjfjfkf
"but" didnt suit there i wanted to say " Dark doesnt mean toxic"
I dropped this ages ago after like second ML died cause I was like nah that's fucked, so I just read the latest chapter to see what's up with this since I dropped it and holy shit bro LMFAO they are INSANE this shit is soooo toxic