Your mom married a rich man who owns a big company

when your mom told you that you're step-dad's son will be staying in your mansion since they're part of the family now you were annoyed by this fact, after a while you met dae hye you're Step-brother he was older than you since you were 17 and he's 19.you're parents went for a vacation for 2 weeks and left both of you in the mansion

"I can't believe i have to take care of this kid"he said looking annoyed and walked away