Uchuu Kaizoku Sara
Japanese title: 宇宙海賊サラ
Alternative titles: Space Pirate Sara, Space Bandit Sarah, Space Pirates Sala
Type: OVA
Source: Visual novel
Episodes: 4
Status: Finished Airing
Aired: Apr 26, 2008 to Feb 20, 2010
Duration: 27 min per ep
Rating: Rx - Hentai
Studios: Anime Antenna Iinkai
Producers: Pixy
Genres: Sci-Fi, Supernatural, 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)