From Chibi Manga:

A high school girl becomes a wife?! And her husband is the worst man? Because she had to pay her family’s debt, she married! The husband is the son of a big Hotel company. The first time she saw him she said "You got a wife thanks to your money! You’re the worst!" "I maybe the worst", he said "but you’ll have to live all your life by my side…"

And then, they became closer, thus begins their love story…