Episode 12 S01 E12

Ko Hyun-jung (as Ma Yeo-jin) Kim Hyang-gi (as Shim Ha-na) Cheon Bo-geun (as Oh Dong-Gu) Kim Sae-ron (as Kim Seo-hyun) Seo Shin-ae (as Eun Bo-mi) Lee Young-yoo (as Go Na-ri) Kang Chan-hee (as Kim Do-jin) Youn Yuh-jung (as Yong Hyun-ja) Lee Ki-young (as Song Young-man) Jin Kyung (as Jung Hwa-shin) Choi Yoon-young (as Yang Min-hee) Jeong Seok-yong (as Koo Ja-song) Byeon Jung-su (as Na-ri's mother) Kim Young-pil (as Ha-na's Father) Lee Jung-eun (as Sun-young's Mother) Ricky Kim (as Justin)

child abuse school classmate