Kenshi Masaki has been kidnapped and brought to the world of Geminar by a mysterious group. To get back home, he agrees to help them assassinate the newly crowned empress of the Shtrayu Empire, Lashara Aasu XXVIII, using a giant robot called a Sacred Mechanoid. As her army fights them off, Lashara takes note of Kenshi's abilities and demands that her attacker be captured alive, only to find out that the pilot is male which is extremely rare on Geminar. Believing it to be a waste to kill him, she makes Kenshi her attendant. As the empress' new servant, Kenshi is required to accompany Lashara to the Holy Land, an academy where Sacred Mechanoid pilots hone their skills. His arrival attracts attention, but Kenshi is unaware that something sinister is brewing within the academy and it could plunge the entire world into war. Mysteriously teleported from Earth, Kenshi Masaki finds himself ensnared by a mysterious organization in a world called Geminar, where male mecha pilots are extremely rare. With the promise of returning home, the 15 year-old agrees to pilot a mecha suit called a Sacred Mechanoid and assassinate the ruler of the Shtrayu Empire, Lashara Earth XVIII. However, things do not go according to plan, and Kenshi finds himself prisoner and an object of scrutiny by Lashara and her shipmates. After learning of Kenshi’s plight, Lashara offers him the chance to redeem himself by entering her employ. He will act as her servant, practically a slave, but also have a chance to once more pilot a mecha suit. Kenshi is willing to endure Geminar’s eccentricities if it means he may return home, but will he ever be able to do so? And what of this mysterious organization that brought him to Geminar to try to kill Lashara?