Mame no Fukushuusha: Blood Parasite

"Would you like to be part of my family?" With those words, the Demon Queen rescued Archive—the weakest member of the devil race—from the brink of death. Cursed with a lethal touch and unable to bear children, Archive found solace as the sole survivor within her chosen family. However, their fragile peace shattered when eight heroes lured the Demon Queen into a trap under the guise of peace negotiations. Powerless to intervene, Archive watched helplessly as she was captured and tormented before being beheaded himself in a desperate attempt to save her. With his dying breath and the Demon Queen sealed away, Archive channeled his final strength into casting Blood Parasite, a forbidden spell, upon Lieselotte—one of the eight heroes who harbored a secret pregnancy. Through this dark magic, Archive's spirit consumed her unborn child, allowing him to be reborn as the son of his enemy. No longer the frail demon he once was, he eventually awakened powerful Demon Eyes capable of Petrification, Charm, Fear, and Clairvoyance. Consumed by vengeance, Archive swore to destroy the heroes responsible for the Demon Queen's downfall, even if it meant turning against the mother who bore his new body. "Just you wait, heroes, I shall kill you all and bring back the Demon Queen!"