The Prince of Tennis: The Divine Pet's Angelic Transformation

The second heir to the Kamiya family is a princess? No problem, as long as the first heir is a young master. This princess controls more than half the family's businesses? No problem, she'll hand them over when she gets married. This princess is actually an eleven-year-old tennis prodigy, the "Sakura Princess," who has been a champion for four years running? You've got to be kidding. Has the world gone mad?!