Aah the typical plot where the mc's will fall out so that the third dude can fuck the uke..
The thing is korean readers (not all but most) dont actually care about characters and morality in bl. If there is a 3rd dude in the story he will most definitely be made to have sex with the main character who he is interested in especially if his character design
is one with power abuse. Its very popular among the readers there.
I dont read this story.. just came to check out where it stands but predictable plot i suppose.