Bonded to an Ant, I Conquered the Future

In a future divided between surface-dwelling nobles and underground slaves forced to generate power, humans grow stronger by bonding with beasts. Oliver, a slave who's never seen the sun, bonds with an ant and is mocked by his fellow warriors. But ants can carry up to 1,000 times their own weight, and Oliver's tiny Bonded Beast may be far more powerful than anyone realizes.