Life Of A Nobody - as a Villain

This is the tale of an average nobody, who after his death got transmigrated in a new world.

The memories of his average life flashed before his eyes, as he found nothing that was noteworthy about him.
So in this new world should he try to change that, should he wish to be supreme, rise to the peak or to rule the heavens, but he's too lazy for that.

"And how come all the names are so familiar. Don't tell me, am I in that novel?"
Soon after waking up he realised this world was based upon the very first novel he read years ago.

At first he felt happy that finally something unexpected happened in his life. But that happiness was short lived as he remembered the plot of the book and the crisis that was coming for the world.

If that wasn't enough he was living in the body of Rio Raven Blake - avatar of Nyx. Known by his other names like The last dark spawn, The first fallen or The infamous Devil.

In a world brimming with dungeons, towers, Gods, Demons, monsters and magic - our MC finds himself trapped in the body of the last villain.

"I don't care about the novel plot, I'll just ignore it, and live my life peacefully."
At least that was his plan, until he heard a voice in his head , that he's been waiting for all this time.

[DING] [TING] [TIDING]

[DID YOU MISS ME??? ]
'The great villain system, what a funny name.'
You can earn points by ruining the plotlines, and can get whatever you want. Let me see, I'm a master at messing things up.

[What, someone is going to do a prophecy that I will become the villain after growing up - kill him while he's still a kid.]
[what, this potion was made for the protagonist and the alchemist heroine - I'll take it with me.]
[ohh you're the one who saves the protagonist when he was about to die - go to prison, you traitor.]
[wait, you have a sister. but she is sick and needs help - here take this potion and work for me.] Got a money making slave for life.
[What, my parents are fixing my engagement with the princess, who's also a main heroine, but will betray me later and help everyone kill me - Humph...just you wait...]

Once the plot started many years later, at the academy entrance exam. Protagonist was shining brightly, breaking all records, taking first rank, but no one was talking about him. As the news came out that the genius of humanity Rio Blake, will be joining the academy too.

Not only mortals, even Gods and Demons were surprised at this sudden development too.
{Nyx nods at her believers achievements}
{Odin says you've grown a lot}
{Gauri/Kali challenges you to fight her believer}
{Jesus prays for your souls redemption}
{Anubis awaits your enemies doom}
{Lucifer writes down your lines, as you take on the Devil persona}

The protagonist just stared at the guy who took all the limelight from him, but his surprise turned to shock, when his sister ran and hugged the man, while crying her eyes out, saying she missed him and she was sorry.
"What is happening? Who is he?
{Apollo curses...}