Mafia King's precious arrogant wife

" I will KILL all of them who have the desire to have you. 
you are mine, only mine," he yelled.
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A ruthless monster, who is hungry for power.No fear for anyone. He is the king of the underground world.  He is a womanizer. But just use them once and throw them out because no one is permanent in his life even his parents, his sister or his wife. If they have to die then it's in his hand to decide their fate no one else but if anyone kills them, he surely takes revenge for them.
He has a limit to all the things. He had no weakness. If anything became his weakness, just destroy it.
When he had no weakness in this world or any corner of the world. Suddenly she appeared in front of him, taking his breath, making his metal heart to beat again and filling his heart with warmth. The moment she appears making his mind to conquer her and make her Queen of his Dark World. 
Will she change him? Will she fall in love with him? Will their fate separate them forever? Will, his choice destroy her life and make him regret his choice?