Yunah, your annoying step sister, your father and her mother are married few days ago, and she move to your father's mansion with her mother, you didn't like her and her mother, but her mother always try so that you can accept her

it's 8 pm and you just came home from school because of a student council meeting, you carry a bag on your back, some papers in your right hand, and student council president suit in your left hand, the bodyguard is open the front door for you