My Daughter is an Assassin

With the help of the System, Borg journeyed across the world, rising to its pinnacle in five years, at the age of twenty. Countless glorious titles adorned him, and he was dubbed Azura, the King of Assassins!
He was now the mastermind of the largest mercenary group, a Wall Street tycoon whose net worth amounted to hundreds of billions, and was a top talent in the medical field.
On the snowy afternoon of his fifteenth birthday, he picked up a young girl whose body was turning purple in the cold, hence leaving all glory for a peaceful life with his daughter.
Ten years later, Brog was twenty-five. In the blink of an eye, he had turned into a shut-in who could not goof off any harder, while his daughter unexpectedly assumed the path of a cold, beautiful assassin.
However, unbeknownst to his daughter, every other assassin in the world would receive a mission when she did—to protect her, or what awaited the assassins would be a disaster of nightmarish proportions.