Kuro no Souzou Shoukanshi: Tenseisha no Hangyaku

An untimely death, brought about by a celestial error, is not a fate one simply accepts. For the high schooler Tsuguna, however, it came with a single, remarkable concession from the god responsible: one favor to be granted in his next life. Reborn into a noble household of a world suffused with magic, Tsuguna carries with him the unique power he requested—the ability to forge and command summoned creatures. Yet, the boon of his new life is immediately overshadowed by a cruel superstition. His dark Japanese hair and eyes, so ordinary in his former world, mark him as a cursed child in this one, a pariah whose powers are agonizingly slow to manifest. Shunned by his new family and society, Tsuguna is confined to a dark, forgotten basement, his world reduced to the dusty tomes of his family's library. In that solitude, surrounded by the weight of his isolation, he immerses himself in the study of magic, a desperate scholar waiting for a spark that refuses to catch. His days bleed into a monotonous routine of reading and waiting, until the moment of revelation finally arrives. Hidden within the ancient texts, he uncovers the long-sought key to unlocking his latent abilities, breaking the chains of his stagnation. With his newfound power now a tangible reality, a fierce determination takes root in his heart. No longer content to be a prisoner of ignorance and prejudice, Tsuguna prepares to step into the light for the first time. Accompanied by the first creature he is able to summon, a partner born of his own soul, he sets his sights on the vast world beyond his basement prison, eager to explore its dangers, test the limits of his skills, and forge a path that defies the curse that was forced upon him.