School life ruined from day one

On the day of the Warner High School entrance ceremony, Hae-joo was almost late, but narrowly made it. Park Si-yeon, Yeo-ju's best friend, and Ha Sung-woon, Yeo-ju's older brother. After the ceremony, Yeo-ju was about to go out and play, but Ha Sung-woon, Yeo-ju's older brother, showed up and hit her on the head. But Si-yeon said, "Ha Sung-woon is famous at Warner High School..." Yeo-ju and Si-yeon were about to go out and play, but Yeo-ju ended up walking backwards and bumped into someone. That