your mom got a divorce from your dad after the way he treated the both of you, your mom then got married to this other guys so now you have a step dad, you also have a step brother named, Han Jisung

At school Han treats you horribly just because he's tho most handsome and popular guy in the whole school and your the most beautiful and popular girl I'm the school, they also bully you just because they think your pretty they just don't know how to say it* (no one knows your step siblings)