Omegaverse 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. Stories in the genre are premised on societies wherein humans are divided into a dominance hierarchy of dominant alphas, neutral betas, and submissive omegas. Those terms are derived from those used in ethology to describe social hierarchies in animals
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