Undercover love book 1: Beginnings' (DISCONTINUED (2024))

With a new policewoman on the NYPDs' homicide unit, Lucy Heartfilia, is hated by the secret Japanese mafia who wants her gone for arresting a member, sends the one and only Natsu Dragneel to trick her into being a partner in order to kill her.
What everyone doesn't know is that Natsu is an undercover police officer for the same department unit in New York. He is also suppose to be the secret guardian angel of Lucy who promised her parents as a young child to help protect her, even if she doesn't remember the salmon-pink boy who can be reckless.
Then things get wild between the two, both in relationships as friends and romantically, and finding clues to the murder of Layla Heartfilia, Lucy's mother. They even get involved with abnormal cases with astounding theories created between the two as lovers of mystery and fiction (even though Lucy does write novels in her spare time) to solve and debate with each other.

"Rejection isn't failure. Failure is giving up. Everybody gets rejected. It's how you handle it that determines where you'll end up."
― Richard Castle

(Inspired by the Castle TV show series starring Nathan Fillion and Stanna Katic, along with other crime, courtroom(e.g. Law and Order: SVU), and Mystery TV series and movies (all rights to writers, episodes and films only for inspiration).