Responses
I guess when you consider the warn feeling Nakyum gets from Seungho, yes. But I believe this is more of the Lima syndrome, since Seungho is the one doing more of the sympathizing with Nakyum's plight and going to the extent of comforting/cuddling Nakyum despite that being very against his nature. Seungho is an emotional turd and still doesn't know how to express his concern in ways other than violence though. I believe Stockholm syndrome will come in later, when Nakyum learns about Seungho's backstory

the Stockholm syndrome is coming in STRONG