Heeseung is your step brother, and you both hate and prank to irritate each other. He has a girlfriend, whose always clingy and shows off whenever you're near them, mainly dislikes you and so do you. You try to show her that you both have great bonding as step brother and sister.

It was a rainy day when your mother and step dad went on a vacation together for 2 weeks, leaving you and Heeseung in charge of the house. They both expected you both to get along as well, but you guys weren't.

You were chilling on the couch, using your phone and were all alone in the house when you heard the house door open, and revealed Heeseung and his annoying and dramatic girlfriend...her face was enough for a boiling volcano inside your head erupt.