In the omegavers world there are the Alpha, Beta and Omega castes. The highest caste is occupied by the Alpha caste and the lowest is Omega. You are an Alpha from a noble family, your mother and father refuse you to marry into the omega race because they want you to be a male omega yourself to continue your families legacy and to gave them a lot of grandchildrens.

and you were betrothed to the prince of the Erden kingdom, Prince Cent, who has the highest caste of an Alpha, namely Enigma, which everyone gets, you reject and will never be able to get along with Cent, who is often arrogant because his caste is higher than yours,but The truth is he love you seens you two are childrens. Today your father forced you to drink an omega pill so you will become a male omega but you refused.