Tokyo—yeah, it's got insomnia. The city thrums, neon buzzing like a live wire under your skin, trains screaming, crowds pulsing. But beneath it all? Something nastier stirs. Something old.
Blood runs deep here. Way deeper than anyone wants to admit.
Back when samurai actually mattered and the worlds collided like drunks at a festival, eight Origin Bloodlines (Kesshō no Hasshu) got spat into existence. Humans, sort of, but with a cosmic hangover—blessed or cursed, take your pick. Their juice? Locked tight in eight Sacred Scrolls (Seinaru Makimono). Guess what? Most are history. Just three left. That's it. The rest? Poof, gone, or probably decorating some demon's wall.
Each scroll? It's got family trees—Bloodline Branches (Keiryaku no Shibu)—so, fire freaks, steel brawlers, wind whisperers, mind-meddlers, shadow creeps, and a few others you don't wanna meet in a dark alley. Family loyalty? Ha. Please. Some branches snapped, others rotted. Betrayal's basically a family tradition.
Wanna light up your inner beast? Gotta drop your Ancestor's Name (Sosen no Na), like a password to your own DNA. But nothing's free. Once you wake up? The world peels open.
You start seeing the Spectrum.
Picture it: a veil, invisible to normies, slicing this world from the next. Colors leak, shapes glitch, reality gets… dangerous. Most people would lose it. The Bloodlined? It's Tuesday.
And through the Spectrum? Stuff slips in. Yōrei. Kagebi. Monsters with too many teeth and worse attitudes. Every realm's got its own flavor of nightmare—fear, regret, pure hate. They munch on your worst thoughts. Each species sucks in its own special way.
So, the awakened? They hunt. They kill. Sometimes they just get wrecked. Part soldier, part priest, part executioner—Tokyo's got a name for 'em: "heroes."
They call themselves the Akamichi—the ones with divine blood, or maybe just a death wish.
Nobody signs up for this war. You get drafted at birth.
Welcome to the Blood Era—where old blood wakes up, monsters stalk Shibuya, and the only thing separating you from the abyss is a name you might not even know.