In order to make her grandma have money for surgery, she signed a debt-lover contract with him. She originally thought that being a good lover would lead to a peaceful life, but she still chose to love him silently.
There are all kinds of women around him, but his heart is lost in her. For her, he has never married and had children. He has been waiting for her. Because he believes she will come back one day. He searched for her for four years without finding her, but he didn't expect that she would take his son and hide away from him. When he found her, she pretended not to know him.