How to Use Guys with Secret Tips (2013)

Lee Si-young

Choi Bo-na

Oh Jung-se

Lee Seung-jae

Park Young-kyu

Dr. Swarski

Kim Jung-tae

Woo Sung-chul

Lee Won-jong

Yook Bong-a

Bae Sung-woo

CEO Jin

Jun Kim

Oh Ji-hoon

Kim Min-jae

AD Jo Seung-hwan

Kyung Soo-jin

Kim Mi-ra

Ahn Yong-jun

Seong-jae

Ryu Hyun-kyung

Resident

Ji Chang-wook

Hong-jun