Official Title	Isekai no Seikishi Monogatari
Alternative Titles	ISM
Type	OVA
Relation	Spin-off: Tenchi Muyo! Ryo-Ohki
Status	Finished Airing
Genres	Action, Comedy, Ecchi, Fantasy, Mecha, School, Harem,
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Description

Kenshi Masaki is the half brother of Tenchi Masaki and used to live in Japan, that is until he was summoned to the land of Geminar. The Land of Geminar has been witness to an endless amount of wars that have been fought using Seikijin, bio-mechanical weapons controlled by a capable warrior called a Seikishi using magic power called Ahou. It is revealed that Kenshi is an amazing Seikishi and it seems someone has a reason for Kenshi to be in Geminar, but who and why are not known.

(Source: ANN)