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A lot of things change in Sabuk while Young Dal serves his time in jail. New allies are made, and old friends become new enemies for Young Dal and Dong Soo.
Lee Beom-soo
Jang Dong-soo
Kim Jae-joong
Heo Young-dal / Jang Dong-chul
Yim Si-wan
Yoon Yang-ha / Jang Dong-woo
Oh Yeon-soo
Hwang Shin-hye
Baek Jin-hee
Oh Jung-hee
Park Ji-yeon
Sung Yoo-jin
Kim Byeong-ok
Ko Bok-tae
Kim Hye-eun
Kim Ok-kyung
Hong Seok-cheon
Man-kang
Kim Ji-young
Oh Jung-hee's grandmother
Park Hyo-ju
Kang Jin
Jung Ji-yoon
Kang Hyun-mi
Noh Young-hak
Jang Dong-soo (young)
Kim So-hyun
Hwang Shin-hye (young)
Kim Byeong-gi
Yoon Tae-jun
Oh Soon-tae
Wan Bae