They're just friends with benefits. They don't have a romantic relationship (yet). It's not like Hakdo takes advantage of Sangho's feelings (at least not right now). Sangho just wants to have sex with somebody. I don't think he cares a lot about why Hakdo has sex with him.
I personally don't think it's fucked up. It's no strings attached sex and they both want that. Their reasons for the sex (like trying to forget a crush) is irrelevant, because it wouldn't change the fact that all they want is still only sex with each other.
Hmmm you guys are right, but something about it just doesn't sit right with me. Hmmmm ╮(￣▽￣)╭
In all honesty this type of relationship they are having is f***** up!!! The guy with orange hair is just using the other guy to forget about his love for his childhood friend.
I know there are a lot of manga characters like this but for some reason this guy just gets on my nerves... like real bad (╬￣皿￣)凸
STILL GONNA READ IT THOUGH LOL (๑•ㅂ•)و✧