No Min-Woo (sometimes romanized as Noh) is an ex member of The Trax and is making a big name for himself in the drama world. He already has 8 dramas and a film under his belt. He hasn't forgotten his musical roots, however and releases some self-produced videos of him jamming out. I'm glad he's starring in Rock Rock Rock and not someone who has no knowledge of the rock world!
Here is a hot drum-cover of 2PM's Heartbeat:
Thanks to PinKellyphant for the tip!