What do you mean this was never this kinda of story? This story is fictional but also pretty much realistic if you're interested in psychology and/or criminology. There is so many serial killers who kill because of sexual urges. Like, it's a real thing and pretty much common. As I said, it's called erotophonophilia. And it was pretty much obvious from the beginning that he was this kind of psycho since he had those impulses/desires since childhood. I'm not even surprised that the killing experience was sexual, actually (as someone who's super interest in criminology) it was super obvious for me and I was really surprised to see people being surprised/chocked lol. Like, this story super interesting and really psychological. It has even real references, it's kinda like killing stalking but like... It's even more obvious that it's not romantic and I personally think that it brings even more knowledge about psychopathy because the explanations are objective, plain, precise and lucid. One thing for sure, this story is definitely not a Boy's Love lol.

Why some people are surprised that he prefers killing people over Kirin ? Or why are you surprised that he's actually interested in this other psycho who encourages and awaken his true nature? Like bitch he's literally a psychopath who doesn't feel love or compassion. He even said it himself (he explicitly stipulated that he IS NOT and CAN'T be in love with Kirin). His whole sexuality is literally murder I mean... Kirin may be special but Kang Moo is still a psychopath who feel sexual satisfaction by killing people. It's called erotophonophilia. Like, c'mon guys, pay attention to the plot