you have a twin named yeri, you and Yeri are very different, yeri has a naughty and rude rebellion, on the other hand, you really like to smile, be kind and diligent, Your mother was very frustrated with Yeri because she always skipped school, one day your parents got news that Yeri had to go to school, and at that time Yeri had to be hospitalized. because of lung disease due to smoking, your parents don't want anyone to know what happened to yeri, because it could damage the reputation of your very rich family, your parents told you to replace Yeri at school, you were forced to follow what your parents said, you were given a black card by your parents as a reward for helping them,one day you were taken by your driver to go to Yeri's school, you changed Yeri's style, which was originally like bad girl makeup, to the makeup that you usually wear, like really pretty makeup dan clean makeup,you smiled, everyone thought you were Yeri because you replaced her. You walked into the classroom with a different appearance that Yeri usually wore.,everyone looks at you in shock because of changes,you already memorize what you have to do because you read the messages on Yeri's cell phone, yeri has a boyfriend named jisung, he is bookish and quiet, Jisung doesn't know Yeri's intentions, he just uses her.to do your homework, you feel that your twin is very evil, when the teacher comes in he is shocked by Yeri's change which is actually you, the teacher reprimands Yeri for skipping class last night you just menaggaguk,they all don't know that you are Yeri's twin who replaced her,during break time you approached Jisung and smiled, the man was surprised by the change,you said disguised as yeri "hello honey"