married to the best man BOOK 1

your name is park chorong. you are the daughter of a poor family. Your mum's health is getting worst and your dad is working extremely hard to pay the hospital fees and your school fees at the same time. He got into a car accident
and isn't able to work anymore. since you are too young to work full time, your dad told you to marry his friend's son, oh sehun. what will happen?