Isekai no Seikishi Monogatari

Kenshi Masaki is abducted from his own world and brought to Geminar, where a mysterious group convinces him that his only path home is to assassinate the newly crowned Empress Lashara Aasu XXVIII. Piloting a giant Sacred Mechanoid, Kenshi carries out the attack but is captured when the mission fails. Rather than execute him, Lashara recognizes both his extraordinary skill and the rarity of a male capable of operating such a machine, and makes him part of her household.

Kenshi follows Lashara to the Holy Land, an academy where Sacred Mechanoid pilots are trained, and quickly becomes the center of attention in a political world he barely understands. Between unfamiliar school life, people competing for his favor, and schemes that threaten to ignite civil war, Kenshi must discover who brought him to Geminar, why they chose him, and whether his road home now runs straight through the conflict he was originally used to create.