
actually now that you’ve brought it up i actually think wooyeon is indeed a psychopath too! sociopaths tend to be more acting on impulse while wooyeon does show some sociopathic traits he does lean more on being a psycho, like you said he does not feel remorse and can blend in with people easily which are psychopathic traits (when you remember that he’s a completely different person on the inside those are not normal traits is what i mean). but i saw some spoilers where someone said that wooyeon “realized” that he’s actually in love inseob that’s i called him a sociopath since they are way more capable of actually feeling some romance in life compared to psychos but since it’s wooyeon, we’re still not really sure if it’s really love so he could be either ╮( ̄▽ ̄)╭

My husband is a sociopath, so I kind of "get" the difference. He's diagnosed with ASPD
In the novel version, Woo-yeon feels differently towards Inseop, so unlike with how he doesn't he doesn't feel anything towards the other individuals around him. He doesn't fully understand it, but then maybe it's love because it's so different. Non-verbatim but that's the gist. And that's the closest we'll ever get in terms of love confession from Woo-yeon. If you have time, you can also check out The Beast Must Die, anothe BL master piece where the ML is a high functioning psychopath.
From my research, psychopaths don't feel normal emotions like compassion, pity, or love. At least not how we normal peeps feel and process them. But that doesn't mean they don't want to be loved or thay they don't bond. They just really have an unusual/peculiar way of showing it.

Yup. When he does something to Inseop, he doesn't stop to consider how his actions will impact Inseop, especially during the early chaps. He orders him around either to make him quit or to observe his reactions and figure things out. He doesn't feel glee or anything, just goimg through the motions of it.

13?! Damn, you are brave. I was 19 when i first reading that and painter of the night. The first ever 18+ pieces that i read. I was not brave enough to read anything 18+ rated when i was below 17 lol i even just start watching film when the characters on screen are kissing when i turned 17 lol I'm a coward really
i recently reread killing stalking and i knew wooyeon reminded me of someone and that’s sangwoo both are sociopaths (psychopath on sangwoo’s side) who just says anything, both are also pretentious but shows their true side to that one twink and i guess both are serial rapists? but wooyeon a tad bit better than sangwoo though i guess he’s not as bat shit crazy lol