Tenchi Muyo! is a Japanese franchise consisting of light novels, mangas, and animes. It began with Masaki Kajishima and Hiroki Hayashi in September of 1992. They created Tenchi Muyo! Ryo-Ohki and aired 6 episodes with two specials. Kenichi Yatani directed two separate OVAs in 1994 and 2003. In 1995 a 26 episode anime was created, Tenchi Universe. It not only was a retelling of the original story, but went more into detail. In 1997, Tenchi in Tokyo was created as an alternate story to the Tenchi series. The newest anime, Ai Tenchi Muyo! aired on the channel Tokyo Mix in 2014. There are several spin-offs and manga adaptions as well in the franchise.
The story generally follows a male member of the Masaki family. A group of girls will somehow end up at their doorstep along with a mission. Most of the stories of the main arcs follow Tenchi Masaki and the group of girls Ryoko, Ayeka, Sasami, Mihoshi, and Washu.