Clockwork Planet Episode 12

At an unspecified point in time, Earth collapses. Despite almost inevitable humankind would perish, a genius engineer known only as "Y" manages to rebuild Earth entirely with gears and clockwork mechanisms, renaming it "Clockwork Planet". One thousand years later, original cities of Earth's countries are flourishing inside the planet's surface gears. Naoto Miura, a high school student living in Grid: Kyoto who is in love with mechanics, is dragged into a world crisis when a mechanical crate crashes into his apartment.