Set in 2016, it depicts events following Frederick's conversion into a Gear and how he found himself trapped in the Gear Project's research facility.

Sin Kiske, the forbidden child of a human and a magically crafted biological weapon called a Gear, lives in a world where magic has replaced science, and scars from the Gear rebellion remain. Attending his parents’ taboo-breaking wedding, he encounters a mysterious girl with deep hatred for Gears, and their fateful meeting threatens to upend the world once again.<br><br>
(Source: Crunchyroll)

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