Choi Young Do, he's 20 years old, your college bully. He has been bullying since 1 year in college. He's the popular guy in the college. Now Kim Eun Ae, 20 years old, cute, gorgeous, shy, friendly, innocent, childish, cheerful, kind-hearted, emotional, altruistic. [You] thought of getting change, and take revenge on him and become the badass girl.

One day, you were in the locker area. Suddenly, Young do and came with his group of guys. He didn't knew, you're badass.