You are a orphan girl attending Domino School, living in an orphanage with Your little sister Hana. Hana attends the same school as Mokuba. One day, when your little sister gets harrassed by some senior boys, You and Kaiba get called in by the principal because a fight broke out involving Hana and Mokuba.

To secure the futures of the Kaiba and your families empires Kaiba signed a contract marriage agreement with your parents. For now you are just a means to an end, but can you knock down the fortress around his heart and change his mind?