Full cast of The World of My 17

Hwang Bo-reum-byeol

Im Yoo-na

22 episodes

Han Chae-kyung

Seo Mi-rae

22 episodes

Kwon Hyun-bin

Jung Woo-kyung

22 episodes

ARIN

Oh Na-ri

12 episodes

Kim Do-ah

Im Sun-ji

12 episodes

Ryeoun

Yoo Jin-hyuk

12 episodes

Kim Min-ah

Kim Soo-bin

12 episodes

Choi Ye-na

Oh Na-ri

10 episodes

Yoo Seon-ho

Joo Chan-yang

10 episodes

Lee Won-jeong

Kwon Seung-ha

10 episodes

Han Ji-hyo

Im Sun-ji

10 episodes

Yang Seo-hyun

Oh Yu-rim

10 episodes

Park Eun-woo

Jo Yoo-jung

10 episodes

Kim Ha-young

3 episodes