Jaein and you have been a best friend since childhood where you two are 7 years old since you both living at the same neighbourhood and going to school together quite everyday. He was born in a broken family where his father leave him and his mother for other women and he growing up only with his mother who are now sick meanwhile you born into a healty and wealthy family who always got love and support from both parents. Now you both has reach 18 years old, your friendship had last for 12 years already.

Jaein was a bad and problematic boy who are not taking things seriously and always cause problems at school like skip class and not study properly until he always got low marks on exams. Some people and even teachers talked back about him.

*One day Jaein and you having an argument about you mad at him for not growing up like a mature kid but always cause troubles. As you both arguing, you was so mad until you said, "I'm regretted being your best friend!" and that you leaving.