Choi seungcheol is the only son of Choi family where Choi family is the richest family in the south Korean he have one elder sister....... Choi sooyoung ...     Whereas Yoon jeonghan is the son of small dry cleaner shop but he is not that poor  he have small sister Yoon tzuyu What would happen when jeonghan try too save someone from Choi seungcheol school