Full cast of Happiness

Han Hyo-joo

Yoon Sae-bom

12 episodes

Park Hyung-sik

Jung Yi-hyun

12 episodes

Joo Jong-hyuk

Kim Seung Beom

12 episodes

Lee Ju-seung

Andrew

12 episodes

Jo Woo-jin

Han Tae-seok

12 episodes

Lee Jun-hyeok

Kim Jeong-guk

12 episodes

Park Joo-hee

Lee Ji-soo

12 episodes

Bek Hyun-jin

Oh Joo-hyung

12 episodes

Baek Joo-hee

Park Min-ji

12 episodes

Moon Ye-won

Woo Sang-hee

12 episodes

Park Hyoung-soo

Kook Hae-seong

12 episodes

Jung Woon-sun

Shin So-yoon

12 episodes

Bae Hae-seon

Oh Yeon-ok

12 episodes

Cha Soon-bae

Sun Woo-chang

12 episodes

Han Jun-woo

Kim Se-hyun

12 episodes

Park Hee-von

Na Hyun-kyung

12 episodes

Na Chul

Na Soo-min

12 episodes

Kang Han-saem

Kim Dong-hyun

12 episodes

Kim Young-woong

Go Se-gyu

12 episodes

Lee Ji-ha

Jo Ji-hee

12 episodes

Han Da-sol

Lee Bo-ram

12 episodes

Yoo Ji-yeon

Park Young-in

12 episodes

Lee Kyoo-hyung

Lee Seung Yeong [Special ops unit] / Lee Seung Yeong

5 episodes

Jung Jae-eun

[I Hyeon's mother]

1 episode

Han Sa-myeong

Seong U Je

1 episode

Jeon Seok-chan

Park Yong Cheol [Seo Yoon's father, #502]

1 episode