Gap Dong 1

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Jeong In-gi Cha Do-hyeok

Jo Min-jun Lee Hyung-nyeon

Yoon Sang-hyun Ha Moo Yum

Kim Min-jung Maria Oh

Sung Dong-il Yang Cheol-gon

Lee Joon Ryu Tae-oh

Kim Ji-won Ma Ji-wool

Kang Nam-Gil Han Sang-hoon

Min Sung-wook Nam Ki Ri

Yoon Kyun-sang Youngest detective

Choo Soo-hyun Oh Young-ae

Yoon Chan-young young Ryu Tae-oh

Hyun Woo young Cha Do-hyeok

Jeong Jae Min Ha Moo Yum [Young]