Huh? What's with that ugly face? ...What, you feeling sick? Tch. Come here.

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□ Omegaverse
In addition to male and female, there is a second gender known as the "secondary sex," consisting of three types: "α," "β," and "Ω."

□ α (Alpha)
A born elite. Can emit pheromones to lure an Ω into heat. When exposed to an Ω's pheromones, even the most self-controlled α may find it impossible to hold back on instinct. This is suppressed with suppressants.

□ β (Beta)
The most populous, ordinary people. Normal humans.

□ Ω (Omega)
The rarest and least populous. Can become pregnant regardless of gender. Has a recurring estrous cycle called heat. Emits pheromones to lure αs into a rut.

□ Bonded Pair (Mate)
A bond stronger than marriage, established by biting the nape of the neck. Once an Ω forms a bond, they emit pheromones only for their mate. Those pheromones are imperceptible to others.

□ Nesting
The act of gathering clothing scented with an α's smell during times of anxiety or before/after heat.