Kang Moo is a psychopath, that's true. He doesn't have emotions and empathy. But he have a moral compass. If he doesn't care about morals he can just pick someone from the streets, plan for a few months and murder them. And he can do it again and again with the intellect he have. The reason why Kang Moo will always choose Kirin is because Kirin restrains him. He would not want the profiler because the profiler encourages him to commit crime. Example, its like a person who is born to like to smoking. He knows he shouldn't smoke because it harms his health but he can't help smoking. So kirin is like his fake nicotine candy. It is not as nice as smoking, but it works well enough. He might not love the candy, but it is very important to his survival. And he needs to keep that candy happy and alive by his side. It is obsessive, possessive and over protectiveness. But everyone cherish their partners differently, so it might be the closest kind of "love" kang moo can ever experience in his life. It is like a feeling you towards a one of a kind ventilator in this world to keep you alive. You wouldn't want to lose that. On kirin's side. I don't know if its true but from my observations he have signs of depression from the beginning of the story. He feels powerless towards the injustice of the society. And he is probably suicidal, as he is kind of willing to die and also be humiliated to seek justice for his sister. His relationship with his parents are not close as well, as implied in his earlier chapters. He probably crave a kind of relationship where he is viewed as essential for survival since he doesn't have much close relationships and his only dependent, his sister, died. I think this craving for attention, plus his gratitude and admiration, for Kang Woo doing all these for him turns slowly into love. It is also implied he is very fascinated with how Kang Moo's brain function, so that curiosity adds to that. That's why he is not afraid of death by Kang Moo's hands. That's why I think, although twisted both of them are destined together.
Kang Moo is a psychopath, that's true. He doesn't have emotions and empathy. But he have a moral compass. If he doesn't care about morals he can just pick someone from the streets, plan for a few months and murder them. And he can do it again and again with the intellect he have.
The reason why Kang Moo will always choose Kirin is because Kirin restrains him. He would not want the profiler because the profiler encourages him to commit crime. Example, its like a person who is born to like to smoking. He knows he shouldn't smoke because it harms his health but he can't help smoking. So kirin is like his fake nicotine candy. It is not as nice as smoking, but it works well enough. He might not love the candy, but it is very important to his survival. And he needs to keep that candy happy and alive by his side. It is obsessive, possessive and over protectiveness. But everyone cherish their partners differently, so it might be the closest kind of "love" kang moo can ever experience in his life. It is like a feeling you towards a one of a kind ventilator in this world to keep you alive. You wouldn't want to lose that.
On kirin's side. I don't know if its true but from my observations he have signs of depression from the beginning of the story. He feels powerless towards the injustice of the society. And he is probably suicidal, as he is kind of willing to die and also be humiliated to seek justice for his sister. His relationship with his parents are not close as well, as implied in his earlier chapters. He probably crave a kind of relationship where he is viewed as essential for survival since he doesn't have much close relationships and his only dependent, his sister, died. I think this craving for attention, plus his gratitude and admiration, for Kang Woo doing all these for him turns slowly into love. It is also implied he is very fascinated with how Kang Moo's brain function, so that curiosity adds to that. That's why he is not afraid of death by Kang Moo's hands. That's why I think, although twisted both of them are destined together.