the kind demon king (demon king Tanjiro in kuroinu)

Vult did it, he successfully conquered the land of Eostia. His dream of his so called sex empire has become a reality, no one can stop him now.....or is it

Olga is in despair, blaming herself a thousand times ever since her defeat. Her arrogance and pride now gone as the black dog continues to defile her. Looking back, Olga feels ashamed, she builds the dark fortress to rebel against her.. previous friend Celestine, disgusted at how humans continuously hunt her kind for their pleasure, and look what she did, she gathered all the beast under her wings and did the same things she's disgusted about...she knows now, she's one big hypocrite.

one day she felt it, a tiny spark of her mana returned, desperate for freedom, she quickly blew the cell shes being held at and quickly ran to her thrones room...her previous throne room, and there she saw, her one and only companion, her loyal servant Chloe now broken getting fuck by this demon in a human skin Vault.

wanting to amend she cast her strongest spell even if it causes her life, this is the only way he can think to amend for all her sins, but Vault has his way with words, those hurtful words get through her.

she's about to surrender, losing all her will to fight, thinking it was all inevitable in the end. But Chloe's sorry state revived her will, this shouldn't be the end , she needs to correct this, but she can't do this alone......and so, changing the incantation of her spell she prepared herself as a magic symbol appears on the floor in front of her. This is her resolve to correct the mistake she made....a summoning spell in exchange for her whole being. A dark collar materializing in her delicate neck. A summoning spell is a risky spell, because it was random, she didn't know what would come out of her summoning spell, but she is sure of one thing, whatever or whoever it is, it will be a creature of darkness. A being that will follow her one wish in exchange for her freedom...