Omegaverse, also known as A/B/O (an abbreviation for "alpha/beta/omega"), is a subgenre of speculative erotic fiction, and originally a subgenre of erotic slash fan fiction. Its premise is that a dominance hierarchy exists in humans, which are divided into dominant "alphas", neutral "betas", and submissive "omegas".[1] This hierarchy determines how people interact with one another in romantic, erotic and sexual contexts.[2]