I Really Don't Want to Control the Beast

In Stardate 2500, the era of beast control began all over the world. In Stardate 3000, the heterogeneous steam came and began to infect alien beasts. Then the gears began to rotate crazily on the bodies of the beasts, and the steam engines continued to roar. This era was called "steam"... It is now Stardate 3500, and if possible, people would prefer to call this era "machinery".