Kwon Minjae is a luna, and it is the rarest gender born one in a few million people. Unlike omegas who can only reproduce with alphas, a luna can do so with betas. And usually, children born from a luna are dominantly either alpha or omega. This made Minjae's parents use their son to expand the family business. They deliberately opened the arranged marriage of 15 year old Minjae, like a rare item waiting for a rich family to give an expensive dowry. Minjae is actually fed up with his life.