Tenchi Muyo! War on Geminar - S01

Kenshi Masaki is kidnapped and taken to the world of Geminar by a mysterious group. To find a way back home, he agrees to help them assassinate the newly crowned empress of the Shtrayu Empire, Lashara Aasu XXVIII, using a giant robot known as a Sacred Mechanoid. As her army fights them off, Lashara notices Kenshi's skills and orders that her attacker be taken alive, only to discover that the pilot is male, which is extremely rare on Geminar. Deciding it would be a waste to kill him, she makes Kenshi her attendant. As the empress's new servant, Kenshi must accompany Lashara to the Holy Land, an academy where Sacred Mechanoid pilots train. His arrival draws attention, but Kenshi is unaware that something sinister is brewing inside the academy, and it could drag the entire world into war.