Game No Sekai Ni Tensei Shita Ore Ga ○○ Ni Naru Made

Kariya is reincarnated into a world strikingly similar to the MMORPG he played in his past life.

He intended to enjoy peaceful days as a Production Class character, but his homeland is suddenly engulfed in the maelstrom of war. Though he manages to turn the tide of battle using the skills he cultivated in his previous life, his true identity as a "Reincarnated One" is eventually brought to light.

His power recognized, Kariya is appointed as the bodyguard to Wald, a handsome prince disguised as a princess. However...

With the forces of Reincarnated Ones gathering in the enemy nation, his homeland crumbling, and the capital city seized, the destinies of the two violently intertwine in the midst of the war.