电视剧
Friendly Rivalry
Woo Seul-Ki grew up in an orphanage out in a province. She moves to Seoul and enrolls in Chaehwa High School, which is a school for the top 1% students in South Korea. Woo Seul-Ki doesn't get along with the other students. A student named Yoo Je-Yi approaches her and they become friends. Yoo Je-Yi is the most powerful student in the school. She has a high IQ, comes from a wealthy family background, and is attractive physically. She has lived as the envy of other people since she was born and she is aware of her superiority. She is also cunning enough to know how to take advantage of her position. She shows special interest in transfer student Woo Seul-Ki. They soon develop a dangerous relationship between friendship and obsession.
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Seul-gi, who went missing as a child and grew up in an orphanage, transfers to Chaehwa Girls' High School in Seoul to find her father. Then, Jae-yi, the top student in the school and the object of everyone's admiration, approaches Seul-gi...
A past exam question from a prestigious academy submitted by someone is the same as the math grade test taken. Seul-gi heads to the prestigious academy as if possessed. She meets Jae-yi there. Can she trust Jae-yi?
Jae-yi gives Seul-gi a new school uniform as a gift. Seul-gi, who had been wary of Jae-yi, finds out about Jae-yi's unexpected side and her heart is unlocked. She decides to go back to sitting next to Jae-yi.
After the class president election, Seul-gi, who has become close to Jae-yi ends up sleeping at Jae-yi's house. Seul-gi wakes up to the sound of Jae-yi's phone constantly ringing, and when she finally opens it, she is shocked!
A copy of Seul-gi's essay, the only one to receive an A+, is found in a drawer of a classmate's desk, and Jae-yi gets upset and tells her not to let anyone read it, but for some reason Seul-gi doesn't seem to care.
Seul-gi is disappointed that Jae-yi approached her for another reason. Before she knows it, the midterm exam is approaching, and Seul-gi, who has run out of medicine, obtains it illegally because she cannot get it prescribed at the hospital.
Seul-gi, who became the top student in the entire school along with Jae-yi, is suddenly threatened by Byeong-jin and is worried that drugs will be detected during the health checkup. Seul-gi approaches Jae-yi, who calls her up to the rooftop.
The school is in the middle of a festival, and Seul-gi is trying to trust Jae-yi again. For some reason, Jae-yi looks for Do-hyuk's phone, and there is a shocking video on the phone she gets her hands on.
Jae-yi, who learned the whole story of the incident, encounters an unexpected person in the printing room. Meanwhile, Seul-gi, who was stabbed, is taken to the hospital by Tae-jun, where she witnesses Tae-jun's eerie secret.
The school is investigated by the police due to the festival incident, and the victim, Seul-gi, is accused of being the perpetrator. When Seul-gi is put in danger because of Ara, who is cornered, Jae-yi makes a choice.
Seul-gi and Jae-yi search for the missing Je-na. Jae-yi finds out that Je-na had a conversation with Kyung-yi on the festival day and questions Kyung-yi. Then, he gets a call from Kyung-yi, who says he knows Je-na's whereabouts and offers a deal!
Jae-yi hears that Je-na had the fake ID card that Byeong-jin was looking for. Then, Jae-yi gets a phone call. Je-na is dead?
Seul-gi, who had been suspicious of Je-na's death, finds out the whole story of the case while looking for Soo-jin and begins to cooperate with Jae-yi. Kyung-yi and Ye-ri each approach the case in their own ways.
Seul-gi and Jae-yi try to find Je-na and make her a witness in court. However, when Tae-jun threatens Seul-gi's life, Jae-yi promises to become the daughter her father wants. Has Jae-yi really abandoned Seul-gi?
During the final exam, the rankings of the entire school change drastically, and Seul-gi is frustrated because she cannot figure out Jae-yi's intentions. As Jae-yi said to use Seul-gi, Tae-jun makes a deal with Seul-gi by offering her a killer college entrance exam question.
Seul-gi and Jae-yi, who have different plans, clash, and Jae-yi ends up betraying Seul-gi and going ahead with her own plan. What was Jae-yi hoping for?