Onaga Katsuro a sixteen-year-old soldier in the JSDF finds himself fighting in the second Russo-Japanese war in the year 2045. Due to manpower shortages, the Japanese government starts using child soldiers, even using girls as young as 14. Onaga Katsuro and his platoon of child soldiers are taken by surprise and he thinks he dies from a grenade but he finds himself in a dark world with one of the 8 gods of creation. The god of Darkness, Sin, Madness, and War has need of a champion.

Katsuro shall be his champion in the new world.

This a story of the greatest triumphs and deepest despairs, of gentle love and corrosive cruelty. Katsuro knows not what the god wants or what he is meant to do in the new world.

But he knows this, the prize offered by that god is impossible to resist. He will obtain that prize no many how many bodies he needs to put into the ground.

After all...

He has nothing left to lose.