Yeah, I love this story too.
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SPOILERS
Han Juwon is becoming obsessed with Leo Seo-Dan.
And Leo Seo-Dan enjoys being the object of Han Juwon's obsession LMAO. Leo Seo-Dan was kind of disowned by his family and has very limited contact with them. So I think he enjoys being needed and obsessed over by someone he admires and is attracted to.
Han Juwon is turned on by Leo Seo-Dan's innocence and the fact that Leo Seo-Dan likes him in a very pure way. He would never get that from a run-of-the-mill BDSM partner.
They're both into what they have going, so what's the harm lol
Hope this story has a happy ending!
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I've seen the raws from chapter 47. I don't read Korean so my understanding may not be completely correct.
Han Juwon has deeply conflicting feelings about Leo Seo-Dan. He's completed obsessed and possessive about the guy, and scared he might reach the point of no return and lose control. That's why every time Leo Seo-Dan pushes him away a bit, Han Juwon tries to give him an out—and KEEPS offering him an out (while he has the self-control to give him a choice).
By the time chapter 47 starts, Seo-Dan has been coming to Juwon's home for at least 10 days. Seo-Dan accepts all of Juwon's forcefulness. Juwon is actually scared of how forceful and possessive he is becoming towards Seo-Dan. At one point, he goes to put out a cigarette butt on Seo-Dan's hand, and Seo-Dan freely offers him his hand, palm up. Juwon throws the cigarette butt on the ground and is scared of his own impulses and the fact that Seo-Dan didn't resist. Seo-Dan is like, "What, you thought I couldn't take it?"
Juwon confesses his ugliest impulses to Seo-Dan, including wanting to lock him up so only Juwon can see him. He sends Seo-Dan home and asks Seo-Dan to evaluate, while he still can, whether he really wants to continue seeing someone as extreme as Juwon. Juwon implies that if Seo-Dan keeps seeing him, it will reach a point where Juwon won't be able to let him go