[8][9][10][5] On July 12, 2019, it was announced that a fifth OVA series was in development with Masaki Kajishima again serving as chief director and Hideki Shirane writing and overseeing scripts.

[11][12][13] The story follows Tenchi Masaki, a teenager whose life changes drastically as soon as he releases an ancient space pirate from 700 years ago named Ryoko Hakubi.

The English-dubbed version of OVAs 1 and 2 was originally aired on San Jose PBS superstation, KTEH in the late 1990s as part of its Sunday Late-Prime (9pm-after 12) Sci-Fi programming block, and then later picked up by Cartoon Network in July 2000 for broadcast on its Toonami block (US and Europe).

The Toonami version was heavily edited for content and to remove blood, profanity and nudity, as well as to shorten the length of the episodes to fit broadcast standards, and featured custom opening and closing credits.

As usual, Mihoshi Kuramitsu was asleep on the deck of the house while everyone else (with the notable exception of Ryoko) was doing chores.

In the story, Mihoshi casts the Masaki household as the various characters in the story: Ryoko as the thief, Tenchi as a Galaxy Policeman, Ayeka as Tenchi's heiress fiancée, Sasami as an apprentice detective, Washu as a mad scientist (not a far stretch of the imagination), and Ryo-Ohki as Ryo-Ohki.

As the investigation progresses (not to mention romantic rivalries between "Ryoko" and "Ayeka"), the detectives stumble onto a plot to destroy the universe.