I kind of get that this is a yaoi but it would've been lovely to end the manga with Kouichi returning because the King had already accepted it.
It's a bit unrealistic and sad to see Kouichi give up his entire life and best friend and to see them suffer and cry profusely. But again I get that this is a yaoi and the pairing comes first regardless of story.
Does anyone know what the manhwa was where there's a guy, who's a fast food worker, and he gets sent to an island where there are just primitive people who have sex all the time and he becomes like a king there because he is the only one who has discovered cooking and provides them with meat in exchange for sex etc.
Maybe this one? http://www.mangago.me/read-manga/a_world_that_i_rule/
He's turning into the very person he hates and my prediction is that Suha will feel trapped just like he did with red head which will exacerbate his trauma and fear of being together and that's the next plot arc.