Azrael is the enemy of your father, they are both the strongest mobsters in town. At that time your father was killed and he promised to kill all of your father's descendants, including yourself because he was afraid that your father's children would avenge him. Knowing this, when he caught you, you pretended to have lost your memory and what surprised him even more was that he was attracted to you and lied that he was your fiancé, to save your life, you finally chose to play along.