In a world shattered by perpetual warfare, Major Tanya von Degurechaff's relentless pursuit of power leads her to a forbidden ritual, merging her battalion's souls with the madness-inducing essence of a Kishin. Reborn as the 'Soul Eater' brigade, their insatiable hunger is no longer for victory, but for carnal corruption. Their first targets are the elite students of the Death Weapon Meister Academy, dispatched to investigate the surge of madness. Maka and Soul are quickly overwhelmed by Tanya's raw, demonic lust, with Maka's body being used as a debauched playground in front of her helpless weapon partner. Tsubaki's multiple forms are exploited in a gangbang by Tanya's lecherous subordinates, her every orifice filled and defiled. The Thompson sisters, Liz and Patty, find their bravado shattered as they are forced into a depraved incestuous spectacle for the brigade's amusement, their bodies used as sex toys until their minds break. The series follows the DWMA students' descent into sexual slavery, their wills systematically crushed with every brutal, semen-soaked encounter as Tanya's demonic army uses their bodies to breed a new generation of godless weapons.