Cinderella Twins

Prince Adrian has lived his whole life in his sister Adelaide's shadow. No matter how much he tries, no one really notices him. Until one day, when his sister refuses an invitation to a ball. When their father forces her to go anyway, the two hatch a plan to allow Adrian to take her place, and live like her until the end of the ball. But, while he's there, he catches the eye of the prince holding the ball, prince Miles.
Adrian is delighted to finally meet someone who see him for himself... Until he realizes he's still dressed as Adelaide. Upset, Adrian runs away from Miles. But, when Miles comes looking for him, what happens when he meets the real Adelaide?