Princess Holiday: Korogaru Ringo Tei Senya Ichiya
Japanese title: Princess Holiday ～転がるりんご亭千夜一夜～
Type: OVA
Source: Visual novel
Episodes: 2
Status: Finished Airing
Aired: Mar 25, 2004 to May 25, 2004
Duration: 28 min per ep
Rating: Rx - Hentai
Studios: Datama Film
Producers: Lemon Heart
Genres: Fantasy, Hentai

The storyline revolves around a princess that has returned after 3 years, and a hero that is given the burden to protect the girls (both the princess and the younger sister).

(Source: ANN)