The students from a luxurious residential neighborhood, the apartment complexes where the middle class resides, and the underdeveloped residential street all go to the same school and learn in the same classroom. The new semester begins, and Da In, a naïve girl, transfers to school from the countryside. Although she's raised by a single mom, she's a very cheerful literary girl. Due to her pure mindedness, she's bullied by her classmates in the beginning, but Se Chan, a boy from a luxurious town, helps her. Se Chan used to be a bully, but he now hates bullying because of his painful memory. He is confused about whether he helped Da In because he liked her or just hated bullying. The story of how Da In survives in the school where the strata exists in her own cheerful way begins.

Lee In-hye
Yoo Da-In

Park Kwang-hyun
Lee Se-Chan

Zo In-sung
Kim Suk-Joo

Seo Jae-kyeong
Jo Dal-Shik

Lee Dong-wook
Lee Kang-san

An Hong-jin
Ahn Young-Jin

Oh Yu-na
Bae Yi-Kyung

Im Sung-min
Im Sung-Min

Lee Han-wi
Park Bok-Man
Boys Over Flowers82%
Absolute Value of Romance88%
Gossip Girl81%
The Heirs77%
Gossip Girl72%
Revenge of Others82%
Bel-Air76%
School 201379%
Sweet Revenge64%
Bitch X Rich82%
Looking for Alaska78%
Heartbreak High69%
Playful Kiss78%
Dream High69%
Daria82%
Doug72%
The Facts of Life70%
The Glory85%
Vampire Academy75%
Extracurricular81%