Umineko - When They Cry: The Rokkenjima Catbox

From the introduction: Once, a Witch sought to claim what was hers, and strived to return all those who were sacrificed to her back to life in her own paradise, the Golden Land. But a single fool refused to believe that Witches could exist, and denied her with all his heart. Because even a single person refused to believe, the magic was spoiled, and those who died went to hell.