S1 • E1
Ok Chan Mi does not believe that Park Wong Seok killed himself and believes the culprit is still at the school.
S1 • E2
Soo Heon is suspicious of Chan Mi's feigned unfamiliarity with Park Won Seok. Chan Mi learns a shockingly different Won Seok from Lim So Mi' portrayal.
S1 • E3
Soo Heon punishes Sa Jung Kyung and is called a hero by the students, but Chan Mi grows suspicious.
S1 • E4
There is a scheme to kick Chan Mi out of school, and Soo Heon advises her to leave.
S1 • E5
Won Seok's case is reclassified as a homicide. Chan Mi learns Won Seok's lie to her.
S1 • E6
Soo Heon finds himself in a predicament as he becomes the number one suspect of a murder.
S1 • E7
Chan Mi gets an unbelievable call, as she holds Soo Heon at gunpoint.
S1 • E8
Chan Mi and Soo Heon are convinced that Gi O Sung is Won Seok's killer.
S1 • E9
Chan Mi is confused when she sees the polaroid photos that Soo Heon stole from O Sung's room. Ah Jung connects Min Seon Ha's father and Soo Heon.
S1 • E10
O Sung's plan to catch Soo Heon fails. Chan Mi and Jae Beom set up a trap to feel out Gi O Sung, but they discover a shocking truth.
S1 • E11
Jae Beom regains his memories, but Soo Heon is unfamiliar with this version of Jae Beom.
S1 • E12
As truths emerge, the time for the final revenge has come.
Ok Chan Mi
Ji Soo Heon
Seok Jae Beom
Gi O Sung
Kook Ji Hyun
Tae So Yeon
Park Won Seok
Im Seung Woo
Hong A Jung
Sa Jung Gyeong