Ace was the mafia boss’s son. Y/n is the hired assassin. Y/n grew up in the underworlds line of business, her parents mistreating her lead to this. Y/n grew into one of the best assassin known in the underworld. Vince, aces father, would always hire y/n to kill of people. Vince treated y/n like a distant daughter, always offering her a place to stay though she rejected. Ace would always see y/n walking onto the property and to his father office to get work when he was working or leaving. Ace grew curious of y/n and wanted to get to know them.