Boy, with Caution

A disgraced teacher finds comfort in an anonymous chat partner, unaware the troubled student behind the messages is growing closer to him.

Drama

Ryu Se-il

(Jang Ki-woo)

Ha Jung-hoon

(Lee Hyun-jae)

Lee Jung-chan

(Kim Jeong-ha)

Jeong Si-wan

(Park Seong-won)

Jung Jae-un

(Kim Ji-tae)

Park Hong-joon

(Choi Young-moon)

Lee Ha-joon

(Lim Hyun-jong)

Lee Chan-yang

(Choi Yoon-tae)

Bae Yeon-hee

(Jeong-ha's Grandma)

Seo Jung-wook

(Chairman of the School Foundation)

Yun Su-jin

(Hyun-jong's Mother)

Lim Soo-hyun