UFO Princess Valkyrie 2: Juunigatsu no Yasoukyoku
English name: UFO Ultramaiden Valkyrie 2: December Nocturne
Genres: Comedy, Romance, Sci-Fi
Type: TV, Episodes: 12
Aired: Oct 4, 2003 to Dec 20, 2003
Studio: TNK
Source: Manga
Rating: R+ - Mild Nudity
Synopsis:
Valkyrie, Kazuto, Akina, Hydra, and friends are back for more when the Key of time suddenly appears along with many other mysterious happenings. All seemed to be linked to a person named "Valkyrie Ghost" whose only goal is stealing Kazuto for herself. As they team up against this seeming unbeatable foe they dig deeper into the mysterious past of Valkyrie's home planet, Valhalla.

(Source: ANN)