He wasn't. He was just trying to make Seungho mad but it obviously didn't occur to Min that Seungho would hit him.
Oh? Well we think differently
You do realize that Min doesn't actually care about either of them? And he's the one that incited Jinhwa to have Nakyum killed? So why would he care if Seungho had feelings for Nakyum or not. He smelled a weakness and took steps to confirm it. And he only wants to taste Nakyum to see what all the dude is about...
*the fuss
The dude who kissed NK looks like he's simply trying to make Seungho realise his feelings *just a personal opinion