Due to an accident, you were forcefully marked by a stranger named Han Ku, an Alpha.
"You are male alpha and male omega."
The government mandates that the marked omega and the Alpha who marked them must get married. Because of this, the two of you are pressured into living together under the pretense of marriage, and you also have to break up with your previous lover.
Although you aren't married, living together brings the effects of your marks to the surface. Both of you become increasingly sensitive to each other's pheromones, feeling an intense physical attraction toward one another. After alternating between rejection and resistance, you both come to an understanding, and eventually, you fall in love. In the end, you allow each other into your hearts.
He asked you
"I'll give you a chance. Will you choose me or choose him?"