(An Attack on Titan/My Little Pony Crossover)
In a Titan-infested Equestria ages from now, the three pony races, pegasi, earth ponies, and unicorns, are huddled together inside three, circular walls; Cadence, Luna, and Celestia. Although the Titans posed as the greatest threat to pony kind, most ponies have grown hostile to each other within the walls.
Each race did something productive to protect their species, but some have become jealous over others. Earth ponies watched over their local citizens, unicorns served for the queen, and the pegasi stood out above all else as they are the best at slaying titans.
Reins, a small earth pony living in the Ponyville District, is determined to fight alongside the pegasi in combat, but he lacked their abilities. Unlike other earth ponies, who would much rather stay trapped in the walls than to be Titan fodder, Reins wants to explore the world pony kind left behind. He'll soon come to witness the true nature of the Titans and realize that the unknown is way more than what he thought.