Empress of all seasons / Emiko Jean.

In each generation, a competition is held to find the next empress of Honoku. The rules are simple. Survive the palace's enchanted seasonal rooms. Conquer Winter, Spring, Summer, and Fall, and you can marry the prince. All are eligible to compete - all except yokai, supernatural monsters and spirits whom the human emperor is determined to enslave and destroy. Mari has spent a lifetime training to become empress. Winning should be easy. And it would be, if she weren't hiding a dangerous secret. Mari is a yokai with the ability to transform into a terrifying monster. If discovered, her life will be forfeit. As she struggles to keep her true identity hidden, Mari's fate collides with that of Taro, the prince who has no desire to inherit the imperial throne, and Akira, a half-human, half-yokai outcast.