Season 1
After the decline of the once robust fields of science and technology, a new energy source known as magic fuels the modern era. Humanity creates forbidden biological weapons: Gears. Those Gears eventually stand against humanity in a rebellion. Although they manage to overcome in the struggle for survival known as the Crusades, humanity’s losses are so great that even after several decades pass, their emotional wounds remain unable to fully heal. Sin Kiske, the child of a human and a Gear, heads to his father Ky and mother Dizzy’s wedding ceremony. Their wedding breaks the ultimate taboo: a union between a human and a Gear. Even with the world at peace, it took many years for such a ceremony to come to fruition. Despite the complex array of emotions surrounding it, the wedding ceremony is met with blessings. When suddenly, a mysterious girl appears… The fated child inheriting Gear blood–and the mysterious girl who despises Gears. Their meeting would shake the world.
01. Ceremony
Sin witnesses his parents’ sacrifice and vows to confront Unika to learn her true motive.
02. Belief in Peace
Unika disrupts the peace ceremony, triggering a fierce clash as Sin tries to reach her true intentions.
03. A Soaring Angel
Sin confronts Unika to prevent a new war, while Elphelt goes missing during a critical investigation.
04. King of Gears
Sin confronts his failures, Unika questions herself, and the true enemy's identity begins to surface.
05. King's Decision
Sin and Unika lose control as Future Nerville’s plan triggers a global Gear rampage.
06. Emissary from the Future
With the world at stake, the warriors clash against a relentless power that threatens everything.
07. Dark Sun
Sin leads a final charge to stop Nerville as allies unite and the fate of the world hangs in the balance.
08. What Makes You, You
Unika and Sin face a pivotal battle that will shape their futures.