Ruri-iro Princess

is a Japanese manga series by Mito Orihara. It was serialized in Jitsugyo no Nihon Sha, Ltd's "Omajinai Comic" magazine from September 1987 to February 1989, where its chapters were compiled into 4 tankobon volumes.

A 2-episode OVA series by Studio Pierrot were released on March 1993.

Plot
Ruri Ohbayashi is a high school girl living with her maternal cousin's family after tragically losing her parents from a fire. One day, her classmate and cousin invites her to see an indie band's live performance when the vocalist drags Ruri to their dressing room, through a mirror, which happens to be a portal to another world called "Prussian Moon" (プルシァンムーン). Ruri then learns she is a blood descendant of the royal family, and must use her new superpowers to save Prussian and discover her own destiny.