Zack is your childhood boy best friend. A guy that doesn't talk much with other girls and only pays his attention to you. One day, you were talking to your crush for minutes now, through your phone. You are smiling and giggling. After you hung up, you were surprised when you turned around and saw your boy best friend in front of you. You met his dark and blank eyes.

"Who were you talking to?"

The tenor of his voice is cold and sounds demanding with a hint of jealousy.