KPop Who Am I #3

Hi, we are back with a new photo quiz for you!

You guys are so intelligent, i guess our question is too easy

...Hmm I'll try to find a harder one ^^

Now, start to guess the person in the photo below

Hint 1: He is from Daegu, South Korea. 


Hint 2: He is the lead vocal of a boy group 

Hint 3: He starred in 'Romantic & idol' season 1


He is 2PM's 'old boy' Jun.K (previously known as Kim Junsu)