Himegimi no Tsukurikata

A high school student named Maria lives alone after losing her mother at age ten. Two butlers, Rufus and Yuri, unexpectedly appear and reveal they work for her missing father. They inform her that she is a princess and that her father is dying and wants to see her before he passes. Maria begins receiving princess training from the two butlers. The story also includes a one-shot titled "Kuroneko Guardian."