I don't think this will go as far as cannibalism and necrophilia but I don't see a happy ending happening either.
See if Bum was a normal guy who was just being held captive that would work but he has his own serious problems. I kinda want that to happen but despite everything I do like Sangwoo... I have issues aha
Actually, I also find myself liking Sangwoo sometimes...
Then, he does something unspeakable and I end up questioning what the heck is wrong with me.
I kind of think Bum will be OK as soon as he gets away from Sangwoo.
Not that I think there's much chance of it, but...
After this update I was thinking the officer could rescue Bum; then, they could end up together, which would be about as close to a happy ending as this story could ever get.
Of course, the way things are going it's more likely that Sangwoo kills the cop; then, makes Bum eat and/or have sex with his corpse.