Transmigrated As A Baby Villain

Can the transmigrated baby villain survive this crappy world until he reaches his 18th birthday so he can kill the protagonist?
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Jay died. He woke up in the body of a baby, and he thought he was reborn with the memory of his past life.
Then, the System happily told him that he transmigrated into an unpublished novel which he stole when he was alive, and he's the main villain called Kaon the Blood Prince, the most vicious superpower human to ever graced the Earth, yet the author didn't develop him very well. The only thing that Jay knows about Kaon is his superpower is using his opponent's blood to make rain. The system said his mission is to take down the protagonist Kade the golden boy. That's easy enough, the protagonist is nothing compared to Kaon in terms of sheer power, and Kaon won in the original work. If Jay completes his mission, he can be reborn in his original world.

There's one tiny little problem: Kaon is a baby, barely one year old. He doesn't know where his parents are, but he's being taken care of by two people: an undead fifteen year old villain and a thirteen year old hero-traitor-to-be. None of them know how to hold a baby properly, let alone raise one in poverty. It seems like everything is out to kill the baby villain. Can he survive to adulthood? And why is everyone named Jay in here?
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1/3 of the book will be focused on the baby growing up into an adult, nightmare mode all the way. The romance will slowly engrave itself into the plot.
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Warning: There will be gore and action movie fight scenes. If you're uncomfortable reading those, you can skip this book.
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Special Chapters
• Every 15th chapter: Excerpt from another world
• Every 20th chapter: User 1's Interlude
• Chapter 25, 33, 36: Villainous Parents' Misadventures

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