Heo Young Saeng's role in the drama 'Sent from Heaven'

Here's a brief description of Young Saeng's role. I am so wanting to see him act, and also sing in the drama. ^^ I wonder... will he be singing a SS501 song? ^^ I am really really excited!!!!! 

Please re-post with full credits! Thanks!

credits: http://www.kbs.co.kr/drama/sentfromheaven/about/cast/cast05.html + ida@Youngsaengfacts (English Translation)