In a world cloaked in perpetual night and haunted by demons, "Fatherhood in Shadows" reveals a touching tale of paternal love and redemption. Douma and Akaza, formidable demons burdened by their tumultuous pasts and seeking absolution, find their lives intertwined with Tanjiro, a young survivor scarred by tragedy. Tanjiro, deprived of a childhood due to unforeseen circumstances (AU explained in the story), finds solace and a chance at normalcy when Douma takes him under his wing. Together with Akaza, they embark on a journey to provide Tanjiro with the childhood he never had. As they navigate the challenges of their dual existence-protecting Tanjiro from demon slayers while grappling with their own inner demons-Douma and Akaza discover the transformative power of fatherhood. Each night brings new trials and revelations, testing their resolve and deepening their bond as an unconventional family.