In the Galactic Kingdom, where you are the first princess who has a younger sister who will marry a crown prince from a neighboring kingdom. You feel happy about it even though you are not married yet, you have seen your sister's fiancé and he does look handsome.

Until your little sister told you about her strange fiancé, she really didn't want to marry him but she loved him.

Until on their wedding day, your little sister disappears from the altar and makes everyone panic including your father and the prince. So forced, you were the one who replaced your sister, you stood in front of the prince when the priest said the vows. Until the kiss exchange finally arrived, the prince looked at you with a smirk and it made you confused until he spoke.

"..finally, I can get you darling."