Karkat and Kankri are, in human terminology, 'Brothers'. That means a romantic relationship between them I'd 'Taboo' or not allowed, in the world of humans called earth where, after the game has ended, they will reside. But, they see nothing wrong with it. For they are Trolls, and therefore, everyone is related in some way or another. But, knowing how the culture of the place they reside is but still having these feelings manifest Leads to Secret little Rendezvous. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ It will be NSFW, or in other words, have mature content such as sexual jokes, sex, sexual references, tentacles(their buldges), Swearing, and Hate sex as they will be vascilating a bit in some parts. That is all.