1 Where do we see the society Yuri's live

Yuri Katsuki was a kind boy, 1.71 tall, with dark eyes, black hair and had spent the last 17 years of his life with one goal: to live long enough to leave his parents' house. No, this isn't a teenager phase, his situation was simply complicated. His father, Aurus Heverest, was the patriarch of the Heverest family and was an extremely rigid, disciplined and responsible person to the point of placing his duties ahead of his family.

The Heverest family, having kinship with the God of Creation, had reached a high hierarchical level, always maintaining good public relations, and each new generation was charged with bringing about an almost miraculous change to society. How did they do it? Well, basically with magic, which were waves of energy that living beings produced during their lifetime, after the peak of the genetic age humans were affected at the molecular level and could not only perceive the waves but use it from this point, the invisible was shown, and beings such as gods, fairies, elves, shifters, demons, angels, nymphs, dryads, kappas, brownies, etc. became common in societies.

Another modification that occurred was in relation to relationships. Speaking directly people were divided into 3 groups: alpha, beta and omega. Alphas made up 10% of the population and were the leaders (constantly succeeding) of the elites, omegas made up 5% of the population and due to the condition of their bodies were heavily attacked by society, and the betas were the majority that would always be eclipsed by the Alpha elites. The hierarchical chain the order of importance follows this order: alpha, beta, omega. Omegas occupy the last position due to their body modification that made them go through a period, which resembles the heat of animals, making them invalid for work during it, as the pheromones released by them become a very potent aphrodisiac for alphas (make them go really wild). A way to end/mitigate the periode's simptons were to get bitten (in the neck) by an alpha, because they were kind of predestined partners for life. That is why, besides taking suppressors, omegas carry metal collars to prevent other alphas from marking them. Alphas literally don't think straight around omegas when they are on heat, and sometimes an alpha pheromones can trigger omegas to enter in a state similar to heat if they are not their lifetime partners, or into full heat if they are their mates.

So we have this society where yuri lived, with magic, with hierarchies, with alphas finding their omega partners (when they were lucky), scheduled marriages between alphas (keeping the lineage pure, if two alphas had a child, their kids chance of being alpha was greater), another reason for the omegas discrimination was because their heat made them a slut in the eyes of dominant proud alpha families and a bother in case of a bond happening with a successful son, after all most omegas were born in common families, so they didn't bring any advantage for the alphas.

Yuri, a beta born from a powerful alpha family, didn't know, but it would change that society.