Omegaverse is a subgenre of speculative erotic fiction and alternate universe storytelling that originated from m/m erotic fanfiction. It features a dominance hierarchy among characters symbolized by Alphas, Betas, and Omegas, with Alphas typically portrayed as dominant and physically strong, Omegas as submissive and nurturing, and Betas as neutral or ordinary. The genre often incorporates elements like male pregnancy (mpreg), heat cycles, bonding, scent marking, and knotting during sexual interactions. Stories usually focus on romantic and sexual dynamics within this hierarchy, commonly involving male- male couples, but also expanding to other pairings and settings. The Omegaverse dynamics are inspired by wolf pack hierarchies and include biological and social roles that influence behavior and relationships in the narrative. Despite originating as fanfiction, the Omegaverse has evolved into a broader literary subgenre with diverse settings, from fantasy to contemporary, often including power imbalances, mating rituals, and sometimes darker themes like oppression or forced relationships. Each author's interpretation varies, with additional secondary classifications like Delta and Gamma sometimes included. In summary, Omegaverse is a genre defined by fictional biological and social roles (Alpha, Beta, Omega) that shape character interactions, especially in erotic and romantic contexts, often featuring supernatural or speculative elements.