They are best friends. No matter where they go, they always be together. Grow up together make them closer. Yes they do have other friends but none of them can be trusted as much as they trust each other. Hana is an innocent girl who never go for a date while Siwon is a popular guy in his school. Even though they are going to different school but at the end of school hour, they will meet up and go somewhere together. Hana has a close girl friend name Hyuna. In school they always gossip about idols and so on. After school hour, they and Siwon will go for movie, playing bowling, go for cybercafé and many more. Some might thought that they are couple but they are not. They just best friend. At the end of their high school, they decided to apply for the same University. Fortunately, they have been accepted in the same Univ. but different course but Hyuna and Siwon get the same course.  So they decided to rent an apartment next to each other cause it is easy for them to go back home together. Hyuna decided to stay with her other friend but near with their apartment