Ikusa Otome Valkyrie 2
Japanese title: 戦乙女ヴァルキリー2
Type: OVA
Source: Visual novel
Episodes: 3
Status: Finished Airing
Aired: Sep 26, 2008 to Feb 19, 2011
Duration: 29 min per ep
Rating: Rx - Hentai
Studios: T-Rex
Genres: Fantasy, Supernatural, Hentai
Themes: Mythology

Leia is a valkyrie. She is captured by Duke, a boss of a monster group, and just when she is about to get executed, Aaliyah, an another valkyrie, appears and beats up all monsters. She tells Duke to free Leia and he does so. But Leia suddenly robs Aaliyah of a silver ring, which gives Aaliyah power, and runs to Duke.... Aaliyah loses her power and finally gets captured.... Like this, Leia and Aaliyah become their sex slaves....

(Source: ErogeShop, edited)