At the Royal Academy of the Kingdom of Rosewell, where the children and daughters of aristocrats attend, the silly Prince Rubens, a candidate for the next king, condemned his current fiancée, the airheaded beauty Christina! his was witnessed by his former fiancée, the mob daughter Lisanna. As the youngest child, she is the uninhibited daughter who was spoilt and given plenty of food by her family. For some inescapable reason, Lisana has no choice but to help Christina and become Rubens' educator.