I think you should read it more closely, its alot more physiological then Kang just wanting to kill people, and that desire does not go away becuase of Lee kirn. Also Kirn is not being raped by Kang moo He loves him but is also internally conflicted at all stages
Also " kill your darlings" like the movie ? Cause that was a real case and Lucian wasn't a pyscopath. He was being pursued by a creep who he meet at age 14 at boy scouts. He moved multiple times and kept being followed so he ended up killing him. That's just flat out a normal reason to murder someone
I'm glad you are not the writer. It would be so basic, betraying all the dynamic and dillema that have been built. Not all psycho story have to end with death to the lamb or beast. lifelong limbo is a proper ending for a pair like them
More realistic and less... "fujoshi"
how are you gonna write a story about a psychopath who's obsessed with killing, whos only stopped because of their lover - and not have it end with them killing their lover???
it feels like the author is treating this story how fujoshis treat killing stalking, its very clearly not a healthy love story but the author tries to portray it as such???? every sex scene is rape, kirin feels like he's forced to love kang moo just because that's the driving force of the plot, there's no justification behind it??
this genuinely would've been perfect if kang moo killed kirin at the end, but no, the author doesn't understand 'kill your darlings' or how to write around death flags