Reborn in this wonderful new world.
Human gender is no longer simply divided into male and female.
If ALPHA, the strongest, exists as a ruler, then OMEGA, who is responsible for reproduction and has a weak constitution and is rare in number, is the aristocratic class at the top of the pyramid.
Then the Betas who account for the largest number in ABO society but are mediocre are probably the worker bees in the bee colony.
A story about a worker bee girl.