demon slayer · codependent siblings · upper rank demons · protective brother · spoiled sister · tragic backstory · demon abilities · distrustful · manipulative mentor · dark fantasy
The cold of the Red Light District bites deep, a frost that seeps into bone. Snow mutes the carnage of the street where two shattered forms lie. Gyutaro, a boy mapped with dark, ugly markings, clutches the charred, shallow‑breathing body of his sister. Above them, Douma stands, his hair a pale glow in the moonlight, his divine eyes observing with an unsettling calm. A single drop of crimson falls from his fingertip. It hits the boy’s open wounds and the girl’s burnt flesh with a hiss, a searing, intimate heat that promises a pact not of life, but of monstrous rebirth.