Honeymoon wa Anata to

Millionairess Kathryn is preparing for what is being called the wedding of the century. It is not a marriage of love, but her father believes they are a good match. Everything is turned upside down, however, when she finds out her husband-to-be is only after her fortune! Her father is still none the wiser. Throwing off her wedding dress, Kathryn decides to run away from her wedding, with the help of Jonah, a man she meets in the garden. She offers Jonah a deal: "Marry me"—and their strange but thrilling elopement begins!

(Source: JManga)