The Essence summary:

Omega dominant 'Rael', who lives in the dark, plans to take the opportunity to take over the Count's house when his brother has an accident. Rael secretly visited a perfume maker named 'Hyde' to obtain alpha pheromone perfume to mask his true scent. Rael pretended to be an Alpha in public, and all this thanks to Hyde's special perfume. But, Rael didn't know the true identity of 'Hyde', a perfumer hidden behind a veil, even rumored to be scary. But every time he came into close contact with him, Rael felt something different... Then one day, the Count declared that if Rael could not give birth to Alpha within two years, the Count would hand over the position to someone else. So, Rael turned to Hyde for help, the only person who knew his identity.