UFO Ultramaiden Valkyrie 3: Bride of Celestial Souls' Day is a oVA anime that premiered in spring 2005.

About the production: the story comes from a manga, there are 6 episodes of about 24 minutes and its current status is "finished".

Its main genres are comedy, romance and sci-fi.

On AniList, UFO Ultramaiden Valkyrie 3: Bride of Celestial Souls' Day has an average score of 66%, a good score, and appears on 1,834 users' lists.

The franchise continues in or follows from: UFO Princess Valkyrie 2: Juunigatsu no Yasoukyoku and UFO Princess Valkyrie 4: Toki to Yume to Ginga no Utage.

The third season doesn`t have a particular story behind everything (like "Valkyrie Ghost" in the second season). It just tells 6 stories about the life of Kazuto & Co. with some additions: Raine and Chorus get a house on earth, the last three Valhalla princesses each get an episode, and in the last episode Kazuto and Valkyrie, who in the same episode managed to stay adult, >try< to marry again. (Source: Anime News Network)

Official synopsis from AniList.