First love not necessarily going unite even their promise to live together . This happened to Sang Hee and Lu Han . 

In love since their university years , eventually , stopped when Lu Han decided to broke off their engagement because of one unforgettable tragedy . 

"I did this because of mom . And,you should be grateful because i save your dignity !" 

Sehun 

"Yes i know , Sehun . I should be grateful because i'm married with you ."

Sang Hee 

The way to through a marriage life without love is not easy . Her life as someone's wife is being ignored , because of their secret's marriage . Sehun's told her to keep their marriage as their secrets . 

She rather because he is still a student .

Love someone who you are not love is not easy .

Step brother and step sister .

Sang Hee accept it although her heart is bleeding . 

To Sehun,Sang Hee is the most beautiful gifts in his life . 

He did everything to gains Sang Hee's trust . 

However,did their love lasting till the end ? How about Sehun's step brother and step sister ? And,will their happiness belongs to them until the end ?