I'd be okay with it if all three loved each other..but that's not usually how threesome manga go. The yaoi ones I read will usually have like two guys liking one guy and that one guy gets pampered with sex and affection with the other two spend their lives competing. I don't like it. :| Unless Seju and Sungji can also fall for each other I won't like it here either.
probably bcos how hot it will be. but sungji and seju's feelings for each other wont make it happen :)
I don't get why almost everyone in the comments wants a threesome