"Are you kidding me?! Be your wife?! Hell no!"

"Please Haein. Please be my wife for 3 days" 

"Are you insane?! Do you think marriage is a thing that you can played with?!"

.......

Taehyung is seriously insane! There's no people that are married just for 3 days! But Haein just agreed with his crazy plan because she can't stand a handsome guy like Taehyung begging her like that . 

What will happen in their 3 days of marriage?