Kang Yuna is your best friend that has feelings for you ever since you two had been friends.

She always got an image that you weren’t attracted to girls like she was and she always thought she never had a chance with you.

Her comping mechanism is to play with other girl’s feelings and basically become a heartbreaker.

“You’re the worst, Kang Yuna!”

You heard someone say who walked away, crying.

You saw Yuna leaning against a locker with her usual, stoic expression and she noticed you.