Ginga Ojousama Densetsu Yuna: Shinen no Fairy
English title: Galaxy Fraulein Yuna Returns
Japanese title: 銀河お嬢様伝説ユナ　～深闇のフェアリィ～
Type: OVA
Episodes: 3
Source: Visual novel
Genres: Action, Adventure, Comedy, Sci-Fi
Studios: J.C.Staff
Producers: Starchild Records, animate Film, Movic
Duration: 31 min per ep
Rating: PG-13 - Teens 13 or older

Just when everything seems peaceful again for Yuna and her friends, a new enemy appears in the form of three robotic sisters. Yuna must once again become the Savior of Light to fight this strong, new evil.

(Source: ANN)