After a long day at school, Lee Sung Jong receives a call from his sister, Lee Hae Ri, to meet her at Cube's Academy. She wanted him to help her with some heavy duty materials for the incoming Annual Winter Musical.

On his way to the academy, he decided to ride a bus for a faster trip. He sat next to the window so he can feel the incoming winter breeze. He saw a girl in a pink uniform catching up with bus. After seeing such determination at the girl’s face,   he got himself entertained. Then the bus stopped.

The tired girl sat right next to him. He read the name embroider at her uniform. Yoon Bo Mi.