The twin sisters were forced to exchange their respective academies due to carelessness. The boy who had made an appointment with his sister Yang Yang to apply for the same music conservatory a few years ago became obsessed with his sister Yang Luoluo after he returned from abroad. While the three were entangled, the friend Yang Yang made when he was very young came back. The sister took the opportunity to get rid of the boy and pursue the school's most popular number two. But my sister fell into a whirlpool of emotions and couldn't make a choice. However, things have changed a lot. Her father who returned to China brought her and she had already been engaged to that accidental friend...