Demon Noble Girl ~Story of a Careless Demon~ - Chapter 3 - Jealousy With a Hidden Motive

He—an enigmatic and cold-blooded soldier with a mysterious background.
She—a ruthless and bloodthirsty spy.

This is a story about the protagonist getting the system, going crazy in the biochemical apocalypse, producing aircraft and tanks, destroying zombies, saving good people and killing bad people.

- Description from novelbuddy

Luan Bednicker, the youngest son of the “Great House.”But… I have no blessings?“The Failure of the Lord of Blood and Iron”“The Fool of Bednicker”I wandered seeking a place to die, away from the clan’s contempt.But then…“You? You’re my disciple, you little shit.”The greatest of all time.The one unparalleled among men.The perfect superhuman.I became the youngest disciple of Baek Nogwang?

As a walk-on, he had been the mistress of his sugar daddy for three year. However, they only had met each other for a few times.
As a boss, his sugar daddy had tons of lovers.
The walk-on: The cake shop is the only thing I love in this world. Lovers? Never want one.
The boss: No problem. Nobody wants that.
Then, they fell in love with each other…
Shameless playboy x heartless rogue
1v1, this is not a decent love novel.

- Description from Novelupdates