One entity, Two worlds

This story talks about the Suile, a seemingly well off nation but with a dark history...
Suile is the dominant country among it's neighboring nations. However as the neighboring nations get more influential over time, Suile finds itself threatened and starts resorting to experiments on their own people to make them tools of war in order to protect their territory, or rather..... to annihilate the neighboring nations before they have the capability to do so.

It starts off with people of lower social class called the "simbas", who are forced to live at the outskirts of the capital. They are captured and forced to be lab rats of horrifying experiments. Although no one really knows the reason why they are captured, they get a rough idea from the rumours. No one dares challenge the capital's actions, not unless they want to be the next one up. Soon everyone will in time live in fear as the capital steers their attention to the next group of people.

The story moves on to focus on a young boy born into a middle class family, who is an exceptional fighter versed in different types of martial arts. He gets accepted into the royal knights, but he ends up betraying the capital to save those next in line for the horrifying experiments.

What will happen to the boy? How will the story progress?