Jung Haeun is a loud, weird, clumsy and fun loving high school girl. Not minding the people around her, she lives her life to the fullest. No matter how much she tries to avoid trouble, it comes chasing after her. Kim Taehyung is the heir of one of the biggest business company in South Korea. Born in a millionaire family, Taehyung's childhood had been a mess. Grown up being forced to follow etiquettes of the riches, he couldn't live his childhood like the other children, turning him into a stubborn and arrogant young man he is. Being her clumsy and loud self, Haeun once messes with Taehyung, ruining his outfit in the process. Trying her best to avoid seeing him again, Haeun finds herself in a strange situation, turning them into enemies. What will happen when they both cross paths again? Two very different personalities, trying not to fall for each other. Will they be successful?