Jessica Jung

The housewife and a mother of three childrens. She's marriage to Lee Donghae and she's really loves her husband. She doesn't know that she had Brain Cancer that can lead to death. She also doesn't know that Donghae had affair with a girl named Yoona.

Lee Donghae

He loves his family but he also love Yoona. He still confuse with everything. He knows that one of her daughters doesn't even love him as her father. He didn't really spend his time with his family but always going out with Yoona. 

Im Yoona

She knows that Donghae has a family and also a father of three children but she still loves him. After Donghae leave her, she accept it but it's makes her confuse when Jessica want a help from her.

This is the first time I'm write a story about Jessica / Donghae / Yoona. So, I'm sorry if it's dispointing you. 

FYI , my grammar is not good