BAE1313: Park Chanyeol is the ice cold CEO who is running for the upcoming mayoral candidate. From there, he stumbles upon Byun Baekhyun, the cute and innocent vegetable vendor who resembles an adorable pup. They were so in love, so happy, but Baekhyun finds out on his wedding night that he might be the only one feeling this way all along.

After the sudden disappearance of his parents, Baekhyun is left alone and unloved, having no place to call home. It came as a bigger shock when his Mother appears at his doorstep 5 years later with an infant, ordering him to take care of the child and never came back.  Baekhyun, a poor and helpless boy, then meets Chanyeol, the rich chaebol.

Chanyeol is the popular kid in school who bullies outcast student Baekhyun for bringing a backpack full with Hello Kitty dolls to school everyday. Chanyeol immediately feels guilty when he sees Baekhyun giving those dolls to a little girl one day at the hospital.