Mr. Baek (16 Episodes)

Shin Ha Kyun as Choi Go Bong/Choi Shin Hyung
Jang Na Ra as Eun Ha Soo
Lee Joon as Choi Dae Han
Park Ye Jin as Hong Ji Yoon
Jung Suk Won as Jung Yi Goon

http://en.wikipedia.org/wiki/Mr._Baek

Cantabile Tomorrow (16 Episodes)

Joo Won as Cha Yoo Jin
Shim Eun Kyung as Seol Nae Il
Park Bo Gum as Lee Yoon Hoo
Bae Min Jung as Jung Shi Won
Go Kyung Pyo as Yoo Il Rak
Min Do Hee as Choi Min Hee

http://en.wikipedia.org/wiki/Cantabile_Tomorrow