Omegaverse Joseon - is the dynastic kingdom of Korea. There are four classes: the yangban - nobility (Alphas, Omegas), the jungin (Alphas, Betas) - middle class, the sangmin - commoners (Betas), and the cheonmin - the outcasts at the very bottom (Omegas, Betas). Society was ruled by the yangban, who constituted 10% of the population and had several privileges. Slaves were of the lowest standing. At this time, society was built on the principles of Confucianism.