Tenchi Muyou! Ryououki 5th Season
Japanese title: 天地無用! 魎皇鬼 第伍期
Type: OVA
Episodes: 6
Source: Original
Genres: Action, Comedy, Sci-Fi
Studios: AIC
Producers: A-Line, Pony Canyon Enterprises, Happinet, AIC RIGHTS
Duration: 28 min per ep
Rating: PG-13 - Teens 13 or older

Masaki Tenchi was a completely ordinary boy, other than being the successor of the Masaki Shrine.
But he ends up breaking the seal that was meant to keep a "demon" banished away inside a small shrine in the back, and is then forced to fight the revived Ryoko (demon)!

Realizing that her nemesis Ryoko has been revived, Ayeka comes to earth as well...
And this is how Tenchi's involvement with the rulers of the galaxy, the Jurai clan, began!

(Source: Crunchyroll)