Rugged male lead vs. little madwoman heroine
The big bads stay in-house.
A romance between two villains who are each other's enemies.
(This blurb is a last-minute effort from someone hopeless at blurbs. It's just a rough framework, with a sample scene below.)
The Demon Lord finds a future rival who will one day seize power from him, and raises her.
A little girl appears in the Demon Palace.
Later,
she becomes his demon general, and then the lord of her own territory.
Just as he expected, she also becomes a traitor.
The immortal and demonic realms wage war for years.
She seizes territory and power, steadily devouring her rivals' influence, until she becomes one of the three pillars holding up the world.
She takes over the most uninhabitable and savage demon realm. Her demon generals are the fiercest villains, and her demon beasts are the most bloodthirsty and vicious war beasts.
Then she starts longing for her foster brother.
[Bonus Scene: A Visit | The Two Sovereigns]
Her demon realm is filled with volcanoes and billowing lava.
The great hall is steeped in hallucinogenic incense and decadent music.
Black-haired, pale-skinned demon women lower their heads as they carry an assortment of things through the bathing pool.
Two skeletal birds lift the gauze curtain for him.
He strolls slowly into the depths of the hall, where he sees the little madwoman.
Her back is turned to him, one half of her robe slipped off to expose her smooth back. A black demonic wolf is tattooed across it, its head encircled by red and green demons and skeletons. Three attendants stand quietly with pigments and tools in their hands. A demon woman kneels with a needle, adding a new tattoo to her skin.
He stops with a roguish smile and a playful curl of his lips.
The attendant in front of her is grinding snake-bone powder. When she looks up and sees him, her lively eyes signal to her mistress.
The mistress of the hall slowly exhales a plume of smoke. She lowers her wrist, lightly lifting the attendant's chin with her pipe, and gets a cute, coquettish wink in return. She laughs softly.
The attendant puts the snake-bone powder back on its plate, then lowers her head and withdraws with the scarlet tray.
The demon women throughout the hall immediately withdraw, quietly and in good order, until not one remains.
She turns her head slightly and looks at him from the corner of her long, graceful eyes.
"Look who's here. My foster brother."
He saunters forward with a lazy air.
Theme: Promote harmony, honesty, and kindness.