Alluring

The Omegaworld

Long time ago, before the modern age, the world of Alpha breed race of Vampires, Werewolves, Sirenia and Succubia were the dominant race. Ruling each continents with their sheer power.  With vampires and werewolves alpha consist mainly male being the alpha and the beta are largely on the female population, an omega species was the rarest amongst their race and was only born female. But only the Sirenia and Succubia are the races that consist of only females, and all of them were omegas. Although these female races are strong they were only few of them, they can hardly breed. 

Feared by their omega powers which can threaten the balance of the world, Vampire clans and Werewolves clans along with other lesser races, begin their hunts (witch hunt) for these dominant omega races. The fight was not an easy one, Sirenia with their command over the ocean and water makes it hard to fight them and some of them have the power to turn their enemies into stones at will, while the Succubia, a races with enigmatic power that can turn their enemy into their allies with power that rules the sky, it was an full out battle for balance. And soon their numbers begin to dwindle until they were completely wiped off from the world. It was a Dark World History considered as the cleaning and was sworn to never happened again. With that a new rules were made, a clan can only have up to 3 omegas more than that, a round table of each clan from different race will be hold, and discuss the rational way to balance it. And thus exist the Round Table Association(RTA) the decisions maker and also keeper of the balance. Each continents are required to send two clans of a different race to become the Ambassador of their Country. And so, the world moves into the modern age era.

A/N : So to perfectly explain my world

Alpha can breed with alpha but their success rate is below 9%

While Alpha and Beta with the most successful rate above 90%

Omega with Omega success rate are the lowest which is approximately 2% (don't worry there won't be any Omega x Omega pairing here, they all died, Siren and Succubi)

Alpha with Omega with 45% success rate.

and Beta can't mate with Beta, thats my ground rule.

And to justify more, Alpha breed mainly born into males, but that doesn't mean there can't be any female Alpha and vice versa for Beta and Omega. 

Vampire and Werewolves are the most elite race, but even within their race there are hierarchy from common to elite. And Other races too do have Alphas and Betas but not omega. 

A/N : I made up the Sirenia and Succubia because it would seem sucked that the world were originally dominated by Werewolves and Vampires only, so there's goes my spices. PS : lesser races would be introduced as the story goes by.