Alphas (dominant males or females), Betas (ordinary working class), or Omegas (submissive males or females). Exact details vary. You can get creative with it. It all depends on the author's style of writing & etc, but similar themes of mating, heat cycles, knotting, & mpreg are the norm in this type of trope of AUs.

May contain elements of or abuse, & are often generally high in kink factors.

Omegas are frequently rarer in the population than Alphas or Betas, & thus often considered the bottom rung in the social hierarchy. Omegas can often be written as an analogy for how women are treated in real life societies.

Like someone stated below the comments, there is knotting, which is at least one member of the ual pairing possesses an animal-like trait whereby the male organ has a gland at the base that can swell to lock the male inside his partner during or after ion, tying them together for a short period of time until the knot deflates. Usually seen in Omega-verse fics, fics, or stories dealing with part-animal creatures such as werewolves.

I hope that helps.

It's a fictional world. You can add things from your own imagination if you want. Just explain how they work and that's it. You don't need to limit yourself. Have fun with it XD ♡♡

after heat if alpha knot omega he will get pregnant hihihi.... I you write a chanbeak clg au