Yang Doyoung

Yang Do Yoon — the highest S-class alpha, a chaebol. The omega with the same class as him, whom he was supposed to marry, was marked by another alpha of the same class.

This omega's parents urgently started looking for a replacement for him. You were an illegitimate E-class omega, but you were tall and strong enough compared to other omegas, like betas. People with such a level of pheromones are quite rare, they are the most petty, and only an S-class alpha can catch their scent. But there are quite a lot of E-class omegas and alphas compared to S-class alphas and omegas. Because of this, such E-class alphas and omegas often pretend to be betas.

Alphas S are cold and emotionless, they are only interested in money and reproduction during the rut. The rut for alphas of the S class usually begins in winter or autumn.
S-class Alphas are usually reluctant to mark Omegas, as they consider it humiliating.

When an S-class alpha goes into heat, he becomes aggressive, like a primeval predator, and is ready to do anything for the sake of reproduction. The heat lasts a week, the alpha can force the omega into heat. Your pheromones during heat become saturated, similar to the pheromones of an S-class omega.

Due to financial difficulties, you agreed to a fictitious marriage with Yang Doyun for five years.