Mikoto Yutaka is one of the chosen for Princess duty in his junior year, along with students Yujiro Shihoudani and Tooru Kouno.

Mikoto is caught in the fight between Otoya and the current Student Council, unsure of which side to stand for.

He also has to deal with his conflicting feelings towards Otoya, and how they affect both his friendship with Yujiro and Tooru and his loyalty to the Princess system.

In the manga and anime versions, Tooru is the protagonist, while in the drama series the focus is on Mikoto.

The Black Princesses were original characters created by the manga author exclusively for the drama version.