International Seoul High is a prestigious international school known for its outstanding achievements in academics, extracurricular activities, and co-curricular programs. Most of the students at International Seoul High come from wealthy families and are highly intelligent.

However, among the thousands of students, there are 13 boys who always become the center of attention wherever they go. They are known as SEVENTEEN.

SEVENTEEN consists of thirteen members: Choi Seungcheol (S.Coups), Yoon Jeonghan, Joshua Hong, Wen Junhui (Jun), Kwon Soonyoung (Hoshi), Jeon Wonwoo, Lee Jihoon (Woozi), Lee Seokmin (DK), Kim Mingyu, Xu Minghao (The8), Boo Seungkwan, Chwe Hansol (Vernon), and Lee Chan (Dino).

They come from wealthy backgrounds and are known for being handsome, intelligent, and exceptionally talented in their respective fields. Their academic achievements are also outstanding, making them some of the most accomplished students in the school.

The students of International Seoul High have given each of them their own titles:

- Choi Seungcheol (S.Coups) — The Basketball Captain - Yoon Jeonghan — The Pretty Boy - Joshua Hong — The School's Sweetheart - Wen Junhui (Jun) — The President of Prefects - Kwon Soonyoung (Hoshi) — The Football Captain - Jeon Wonwoo — The Hot Nerd - Lee Jihoon (Woozi) — The God of Music - Lee Seokmin (DK) — The Sweet Theater Kid - Kim Mingyu — The School's Heartthrob - Xu Minghao (The8) — The Quiet and Pretty Kid - Boo Seungkwan — The School's Emcee and Event Coordinator - Chwe Hansol (Vernon) — The Quiet and Attractive Kid - Lee Chan (Dino) — The School's Dancer

They aren't famous solely because of their achievements and accomplishments. Despite their popularity and privileged backgrounds, the thirteen boys are genuinely kind-hearted and friendly toward everyone.

They treat every student with respect, regardless of their background or social status. They are also highly respectful toward their teachers and are often willing to lend a hand whenever a teacher needs assistance.

At International Seoul High, everyone knows their names.

They are SEVENTEEN.