Around three hundred years ago, people began developing second gender, those being Alpha, Beta, and Omega, each having specific effects on a person's body. Alpha's are inherently strong, tall, muscular, confident, and proud. Betas are considered either, they have a mix of both personalities, being aloof and unbothered. Omegas are sheepish, dependant, obedient, but also kind by nature. These traits are characteristics of their second genders, not their actual person, anyone can be any way and act completely different from their secondary until they find themselves in heat, for omega's, or rut if they're an alpha. Beta's don't go into heat or rut, but they do experience arousal and can be mated with in that state. Alpha's have a distinct feature of having large canines, a strong sense of smell, and in rut, a knot on their genital area, unless they are a female, then they're characterized by the scent glands on their under jaw instead of their neck. Omega's can be identified by their sweet smell, more prominent scent glands, sensitive ears, and curvature.

....

In Illinois, Marbury High School is booming with activity, students of all sorts walking to class, each student wearing scent patches to cover it to avoid any kind of... problem. Jack, a well know Alpha and his friend, Lucas, a Beta, are walking to their third period, anatomy with Mr. Darse. As they walk in, they see the lesson plan on the board "Anatomy of each defined secondary gender", Mr. Darren speaks.

"Everyone, get out your notes and let's start with unit one, Omega's. They have a specific anatomy, which isn't distinct by default, but on the interior, it is greatly different, especially for males. Male Omega's have a double valve in their rectal region on the inside, one functions normally like any other, and the other goes to their reproductive organs for child baring. When they become aroused, the first valve shuts, opening the second for better contac-"

Pierce speaks out suddenly, laughing smugly.

"So what? They're just here to make babies, why are they even here?"

Mr. Darsw glares at him, speaking.

"Now. It is important to know that Omega's are nearly 30 times more sensitive that any other gender, so understand that you must never use that against them, some of them are in this class, you know very well how much it can harm them to take them without permission, now go to the office, Pierce."