Kuroinu: Six Black Heavens Guns

In a world called Inamorta, the seven nations of the continent of Eostia fight desperately against the monsters of the north. In their centuries-long war, Eostia has begun to depend on a famed mercenary group known as the Kuroinu, the Black Dogs, to help their armies control the borders to the northern daemonic lands. However, in a cruel twist of fate, Vault, the leader of the Kuroinu, rose up with the monsters of the north to overthrow the nobility of Eostia and created a nation of depravity ruled by the lustful desires of men. In this, they succeeded, plunging the world into wanton lust and hopelessness.

The seven princesses that lead these nations have fallen and have been subjected to the cruellest of fates.

In a gamble to save her world, the Goddess Laurentia, with what little power she had left after the slaughter of her worshipers, summoned forth a hero to save her people; save the people of Eostia.