Real romance. They tried so hard to hide this. Why are they seldom even avoid to do fs on stage but easily to do it with other members? I bet they also know there are wonkyu, hyukmin and other shippers. If they are not comfortable with the gay thing, they already separate the room from years ago. They choose to stay together for 7 years. And their eyes can not lie. Also the way they always stand next to each other is indicates that they are belong to each other. Sungmin could be beside others instead of him. But they choose to hold their hands together. And up to now, they still holding hands at the end of show. They maybe separate now, but at least kyumin was real. Dont know what will happen in future.

of curse they where real,is so obvious they where lovers maybe even a official couple (in doors of course),they where more that roommates and I believe that this is not the end of their love maybe just a change of rules or a break but I truly believe that with time we see them together again at the end~

Yes. Eyes cannot lie..you can see it clearly form thier eyes - the spark which only reserve when they look at each other. Also the subtle gestures...
There's more. But these two reasons are enough for me to believe that kyumin was once real.