Uchuu Kaizoku Sara
Japanese title: 宇宙海賊サラ
Type: OVA
Episodes: 4
Source: Visual novel
Genres: Sci-Fi, Supernatural, Hentai
Studios: Anime Antenna Iinkai
Producers: Pixy
Duration: 27 min per ep
Rating: Rx - Hentai

Sarah is a most terrible pirate knight who dances her way around the galaxy empire that has been ravaged by war. In the galaxy ruled by a number of power-hungry rival warlords, an evil sadistic web is woven around Sarah, who is slowly guided down to her destruction. When the silver knight Sylia comes across the evil aristocrats who have run the gamut of corruption in the galaxy and the slave traders of darkness, the demonic twins, a desperate predicament is visited upon Sarah!!

(Source: dlsite)