Tenchi Muyo! Ryo-Ohki is a oVA anime that premiered in fall 1992, produced by AIC.

About the production: the story comes from an original script, there are 6 episodes of about 29 minutes and its current status is "finished".

Its main genres are action, comedy and sci-fi, with themes such as Female Harem, Space, Aliens and Police.

On AniList, Tenchi Muyo! Ryo-Ohki has an average score of 73%, a good score, and appears on 12,779 users' lists.

The franchise continues in or follows from: Tenchi Muyou! Ryououki Omatsuri Zenya no Yoru!.

Tenchi Masaki was a normal 17-year-old boy until the day he accidentally releases the space pirate, Ryoko from a cave she was sealed in 700 years ago as the people thought she was a demon. In a series of events, four other alien girls show up at the Masaki household as Tenchi learns much of his heritage he never knew about and deal with five alien girls who each have some sort of romantic interest in him. (Source: Anime News Network)

Official synopsis from AniList.