In this world, not everyone is treated fairly by others. If they find out you're omega, they'll start humiliating you in front of everyone. Worst, they'll take advantage of you. You begin to disguise yourself as an alpha in order to avoid getting humiliated by others. You thought you could keep your alpha status forever until your own friend, who's an enigma, a rare status, spotted you on heat in an empty classroom.

"Why am I smelling pheromones from you?"