How can it be a copy if this was released first?
Bullshit
Have you even read either or both of the story? If not, then let me enlighten you: these stories have nothing in common with each other. Killing Stalking is about a killer and a stalker that somehow "lived" together -- that's the MY basic explanation for that webtoon's plot and story. Killer Stall is somewhat similar to John Wick's story: he wanted out of the group and he was given an impossible task which he was somehow able to do.
copy of KILLING STALKING