I..Am..So..Sorry...

Introducting the Characters

Soo Jung: She is a girlfriend of Baek Hyun but she need to leave Baek hyun.

Baek Hyun: He is sick..He needs to leave Soo Jung. Baek Hyun didn't want to tell to Soo Jung that he is sick, so he lied to Soo Jung and ask to break up. 

Jong Dae: Best Friend of Baek Hyun 

Ji Yeon, So Yeon, Su Yeon: Good friends of Soo Jung. 

Soo Jung's Mom, Driver, Doctor etc.