S01E01 Episode 1
After living in a orphanage, Woo Seul-gi transfers to a top-ranking school hoping to find her father - and soon catches the eye of a popular student.
Friendly Rivalry
S01E03: Episode 3
Yu Je-i continues to show kindness towards Seul-gi and invites her to her private study space, drawing the two girls closer together.
Overview
A high-teen mystery thriller about a close relationship between teenage girls in a harsher survival competition than entrance examinations.
Episodes
S01E02 Episode 2
Facing a heartbreaking discovery, Seul-gi struggles to adjust to her demanding schoolwork, while her background makes her a target of bullyng.
S01E03 Episode 3
Yu Je-i continues to show kindness towards Seul-gi and invites her to her private study space, drawing the two girls closer together.
S01E04 Episode 4
A furious Choi Gyung becomes suspicious when Je-i nominates Seul-gi as class monitor. Ju Ye-ri overhears a conversation about Je-i's former seatmate.
S01E05 Episode 5
While Seul-gi finds details of her family history on Je-i's phone, Choi Gyung looks into the connection between the two girls'past.
S01E06 Episode 6
Students take drastic measures to beat the stress of midterms. Choi Gyung shares a discovery with Seul-gi, causing them to question Je-i's intentions.
S01E07 Episode 7
Ye-ri makes a deal with Je-i's father, Yu Tae-jun, by using his secret against him. Seul-gi worries about a healt checkup following her exams.
S01E08 Episode 8
Ye-ri steals Seul-gi's father's phone. As she tries to unlock it, the rest of the students head to the school festival.
S01E09 Episode 9
An attack at the festival causes panic at the school. Je-i comes to face with a figure from her past as they fight over the stolen cellphone.
S01E10 Episode 10
As the police investigate the school's drug problem, Seul-gi comes under suspicion. Je-i makes a deal while seeking to help Seul-gi.
S01E11 Episode 11
Struggling to find Yu Je-na, Je-i decides to frame her for dealing, hoping the police will be able to locate her before their father does.
S01E12 Episode 12
A traumatic discovery leaves Je-i in a vulnerable state. Feeling uncertain over the situation, a suspicious Seul-gi looks for answers.
S01E13 Episode 13
While attending a funeral, Seul-gi suspects foul play. Her search foe evidence leads to a grim connection between her father and Tae-jun.
S01E14 Episode 14
With the help of Seul-gi, Je-i uses hidden cameras to spy on her parents, hoping to find a witness who can assist with the court case.
S01E15 Episode 15
Je-i and Seul-gi take drastic steps when their ranks slide after a big test. Byeong-jin pressures Choi Gyung into taking pills to maintain her grades.
S01E16 Episode 16
Leading up to the exam, Je-i and Seul-gi craft a final, defiant plan - but there are high risks for everyone involved.
Cast
Lee Hye-ri
Yoo Je-yi
Chung Su-bin
Woo Seul-gi
Kang Hye-won
Joo Ye-ri
Oh Woo-ri
Choi Gyeong
Kim Tae-hun
Yoo Tae-joon
Chae Seo-eun
Jo Ah-ra
Choi Young-jae
Nam Byeong-jin
Kim Sang-ji
Beom-soo
Lee Won-jae
Woo Do-hyeok
Yoo Jung-Rae
Homeroom Teacher
Kang Jin-ah
Kwon Hee-yoon
Ma Hyun Ji
Park Byeong-hui
