A sexual setting loosely based on popular conceptions of wolf behavior, commonly associated with yaoi stories.
Humans are split into one of three biological categories, often called secondary sexes (with female and male being the primary sexes):
Alpha (Dominant, may have actual wolf biology such as a knotted penis)
Beta (Subservient, humans as we know them)
Omega (Extremely submissive, lowest rung, both genders are capable of getting pregnant and can go into heat. Males are sometimes portrayed as cuntboys or male futanari).
Alphas and omegas are typically portrayed as having pheromones that induce arousal in the opposite secondary sex. In some stories, alphas are even capable of controlling omegas' behavior with pheromones.
While this setting originated in fanfiction, it has expanded to other mediums like visual novels and manga.
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