Smizle
Humanity lost the surface long ago.
The world once known as Earth is now a graveyard of ruined cities, monster nests, and forgotten civilizations. Enormous creatures roam the wastelands, making life on the surface nearly impossible.
To survive, humanity moved underground.
Deep beneath the ruins exist three worlds:
Sizpanna, the deepest and safest layer where most humans live.
Nexus, a technologically advanced world of mechas, weapons, and military power.
And the mysterious Smizle Layer, where dangerous experiments and humanity's greatest secrets are hidden.
To fight the monsters of Old Earth, the government organization Gov.NZ created the Smizle Program.
The results were horrifying.
Only twenty percent survived.
The rest died.
Those who lived gained the ability to transform into powerful beings known as Smizles.
With glowing veins, superhuman strength, unnatural speed, floating movement, and abilities beyond human understanding, Smizles became humanity's strongest weapons.
But every transformation comes at a cost.
Blood.
The more power they use, the more of their humanity is consumed.
Among the few surviving Smizles is Yamiko, a young investigator working for Gov.NZ.
Alongside her team — Rem (swordsman), Akio (gunman), and Mizuki (healer) — she investigates monster incidents across Old Earth while competing against rival Smizle users such as Kiyori, Kurumi, and Kai.
When an old unfinished case in District D leads Yamiko's team to the discovery of a Hollowfang — an invisible, failed experiment from the Smizle Program's secret Phase 3 — a hidden truth begins to emerge.
Because the Hollowfang is not a monster.
It was human once.
And the twenty-fourth victim they never found is still out there, somewhere in the dead sky of Old Earth, running from something worse than death itself.
As ancient threats awaken and the line between human and monster begins to disappear, Yamiko must uncover the truth behind the Smizle Program before the world faces a catastrophe greater than the fall of Earth itself.
Some monsters hunt humans.
Some monsters destroy cities.
But the most terrifying monsters...
were once human.