I Was Invited to the Otherworldly Country as a Warrior, But Refused and Decided to Start as a Soldier

Ordinary high schooler Yukikazu Totsuka suddenly finds his life turned upside down when he's transported to another universe — along with his whole class! While his classmates are hailed as heroes and appointed warriors in the new world, Yukikazu chooses to follow a different path: starting from the ground up as a humble military recruit. Can he climb the ranks, survive life as a soldier, and find out the truth behind this mysterious summoning? (Source: Mangamo)