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