Just some ideas thats been in my mind for quit a while. Have fun reading it. I'm gonna break it into several small parts. If the story is the same as yours, I'm sorry it was unintentional. Sorry for the grammar errors.

Character:

You (Yoon ____)

- sarcastic

- quiet most of the time

- loves her family the most

- Smart

- loves all type of music

Yoon Ji Hye

- elder sister

- can be crazy

- loves to watch k-dramas

- dated Siwon 

\

- one of your bestfriends

- loves to dance

- take the same course as you in college

- family is rich

- soon will play an important role in your life

- your other bestfriends

- loves to sing

- take the same course as you in college

- rich family