Billionaire Mafia's Manny

"Who. Are. You?" The voice of his attacker was so dark, and commanding.
Zeno was a fighter, but he felt a chill run down his spine from the sound of the voice.
The hand around Zeno's neck tightened, but he endured it.
Judging by his attacker's looks and actions of confidence, this was his boss.
~~~
After losing his parents and being faced with an unbelievable medical bill; Zeno Evander finds himself working as a Manny for a mysterious Billionaire, but it doesn't last long, after almost being killed by the Mafia billionaire, Zeno swore never to return there ever again.
After a week of escaping the Mafia billionaire, Zeno finds himself kidnapped and Blackmailed into signing a year's contract as the Mafia's Manny and bodyguard.
Could Zeno escape his evil and monstrous boss? Or would he be consumed by him? Consumed by the forbidden passion he felt build up between them? Would he risk his life just to experience the burn of forbidden love?
Betrayed by his family, ex-wife, and friend five years ago, Sebastian Orion became a totally different being, cold, aloof, and dangerous as he rose to become the most feared Mafia king of the underworld, and everyone who heard his name shivered from fear.
He distrusted everyone and hated any form of human relationships, building a thick wall around himself.
But, not until his son's manny came into the picture.
Zeno irritated him. He hated the mere sight of his bodyguard and would have killed him, if not for the sake of his son.
Sebastian tried to push Zeno away by treating him in the lowest way possible.
But when the contract was coming to an end, were his feelings still the same? Or did he suddenly realize that it wasn't only his son who needed Zeno?