Spoiler text.
From what I heard based on the novel they kind of stay together but not in any form of love but juyeon(pale dude) Isolating jiwook(tan guy) from society and breaking him completely to the point that jiwook decides he's better of with living like this now and juyeon keeps him as basically a pet but yeah it's srsly fuc*** up and I honestly don't even know which side am I on it's a really uncomfortable story