Monstar (12 Episodes)

Ha Yeon Soo as Min Se Yi
Yong Jun Hyung as Yoon Seol Chan
Kang Ha Neul as Jung Seon Woo

 http://en.wikipedia.org/wiki/Monstar

Potato Star 2013QR3 (120 Episodes)

Ha Yeon Soo as Na Jin Ah
Yeo Jin Goo as Hong Hye Sung
Seo Ye Ji as No Soo Young

 http://en.wikipedia.org/wiki/Potato_Star_2013QR3

Cunning Single Lady (16 Episodes)

Lee Min Jung as Na Ae Ra
Joo Sang Woo as Cha Jung Woo
Kim Gyu Ri as Gook Yeo Jin
Seo Kang Joon as Gook Seung Hyun

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