Taeyeon is a normal girl who grew up with a normal life. One day, her parents were in car accident, along with her. Both parents died, and only Taeyeon survived. However, Taeyeon has transformed from a bubbly girl to a quiet and shy girl who looks tough on the outside, but holds her tears on the inside.

Leeteuk, a popular guy in school known for his looks and being a player, goes to Seoul High School In South Korea. He has never really experienced pain, and also doesn't understand love. He meets Taeyeon, and things change from there on.