Triangle

Kang Hye-jung

as

Oh Sung-hye

Ahn Jae-wook

as

Ryu Sang-woo

Lee Soo-kyung

as

Han Ji-young

Lee Sung-min

as

CEO Lee Byung-...

Heo Jung-gyu

as

Detective Won

Kang Shin-il

as

Vice president...

Lee Dae-yeon

as

Section Chief ...

Cha Tae-hyun

as

(cameo)