Isekai no Seikishi Monogatari is a fantasy OVA animated by studio AIC (Anime International Company), as a spin-off from the highly prolific anime franchise Tenchi Muyou!. The story is set in an alternate world called Geminar, where countries have fought endless wars with replicas of humanoid Seikishi weapons that they found in ancient ruins. 15-year-old Kenji Masaki, the half-brother of Tenchi Muyo! protagonist Tenchi Masaki, is summoned from another world to Geminar.