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Late at night, Gi Kang Je and Yu Beom Jin meet for the first time in a strange ordeal dealing with Ahn Byung Ho on the rooftop of Cheonmyung High School. Although they resolve the situation, Beom Jin leaves Kang Je with a little insight into the school. Kang Je starts to notice suspicious things all over the school and gets a little closer to finding out the truth behind the murder. Meanwhile, So Hyun worries over Byung Ho getting bullied in and out of school.
Kim Ye-won
Shin Hye-Soo
Jeong Soo-hyun
Lee Hae Jun
Joo Se-Bin
Na Ye Ri
Lee Jung-jun
Kim Hyung-gyu
Shin Jae-hwi
Shon Jun-jae
Lee Jung-min
Kim So-Hee
Lee Bit-na
Lee Ji-Eun
Jang Dong-ju
Kim Han-Soo
Choi Kyu-jin
Lee Ki-Hoon
Choi Yu-hwa
Cha Hyun-Jung
Geum Sae-rok
Ha So-Hyun
Lee Jun-young
Yoo Beom-Jin
Yoon Kyun-sang
Ki Moo-Hyeok
Woo Hyun-ju
Jeon Young-Hye
Jun Suk-ho
Lee Tae-Seok
Kwon So-hyun
Seo Yoon-Ah
Byung Hun
Ahn Byung-Ho
Jeong Da-eun
Jung Soo-Ah
Suh Yun-a
Jo Mi-Joo
Seo Ji-young
Woo Eun-Hye
Kim Min-sang
Yoo Yang-Gi
You Seong-joo
Lee Do-Jin