It seems to me (as of the update) that he actually slept with the manager guy. I'm assuming that they kissed, the guy punched him again like usual and then he ended up calling the manager for a booty call in his drunken state out of depression.
Aw, that manager-san is hot I really don't mind if he falls for him. Hopefully he'll get treated well and not being punched around anymore. But I could see blonde realizing that sex with him isn't that bad and blonde will realized that he's falling for him. ╮(￣▽￣)╭
That'd be an interesting story though to be honest i don't see it happening, as of right now it seems like he is just interested in the noona. I think the story is going to be this: i don't think hyunwoo is actually a main character, i think he is just an integral part of the uke's past and as such appear quite a bit in the story of his past. I think this manga is actually about how the uke and the manager ended up together from a past to present point of view.
I would totally root for the manager. Hopefully he'll treat him well.
I know, i'm excited for it ^_^ I can tell we have quite a bit of drama between him and his old flame before he gets with the manager though...
you got to f*ck with him, he's now your first, obviously he likes someone else so just take those sweet memories with you and move on and find a new love.