AKUMETSU

For centuries, Kibutsuji Muzan has been haunted by one absolute weakness: the sun. When his relentless search for the Blue Spider Lily reaches a dead end, his desperation draws the attention of Death (Shinigami)-a rogue grim reaper left without a master. Death offers a dark pact: cross the dimensions of time to the ancient ruins of Wallachia to resurrect the true Lord of Darkness, Vlad Dracula Tepes, whose heart was shattered by Simon Belmont centuries ago.

As payment, Muzan's high-tier demonic blood and the cursed slashes of Kokushibo's flesh blade are offered as catalysts in a bloody baptismal ritual. The resurrection is a success, but it triggers a catastrophic convergence. Dracula's awakening merges Castlevania with the Infinity Castle, birthing a colossal Gothic labyrinth that drags Taisho-era Japan into an eternal night bathed in a rain of blood.

Absolute terror reigns as Dracula's horde of Night Creatures joins forces with Muzan's Upper Rank Demons. Humanity is no longer hunted merely for food, but harvested as ritual sacrifices to grant both Muzan and Dracula ultimate immunity to sunlight and dominion over two realms.

Yet, in the depths of despair, this dimensional tear also summons an echo from the past. Richter Belmont, the legendary vampire hunter bound to the holy whip Vampire Killer, is violently pulled into the Taisho era. Amidst the rotting ruins of a dying city, he crosses paths with Kamado Tanjiro, the scarred youth who wields the Hinokami Kagura (Sun Breathing), and the surviving Hashira.

Armed with a holy whip forged to shatter European curses and a crimson Nichirin blade meant to incinerate demonic flesh, this cross-era alliance must breach the hellish labyrinth of Infinity Castlevania. They are not merely racing against time before the sun is extinguished forever; they must also survive the psychological torment inflicted by Death and Kokushibo, who are waiting in the shadows to weaponize their deepest traumas.