It's interesting when little Kaida turns four and Lucilia turns twelve when Lucilia meets her soulmate. To that day, Hibari Tsuyoshi, named after a pretty damn good sushi chef, had never spoken a single word to Lucilia. Both got along – Tsuyoshi was a Sunny Cloud, Lucilia a damn great Mist – and the two had never touched or said words to each other in the four years they'd lived in the Vongola mansion.

Part of it seemed to stem from Lucilia's aversion to touch, in general, save for her parents and Kaida; another was that Tsuyoshi lived with Kyoya half the year in Japan.

Another part of it was that Tsuyoshi and Lucilia's dads had expressly forbidden their children to go near each other.

(Obviously Lucilia inherited her mother's love for pranks and rule-breaking. Tsuyoshi was a cunning child, too.)

It happens at dinner. Naruto was attempting to toss up her fish and eat it out of air, but half-assed it so much it made a mess behind her.

Lucilia only stares at her in dismay before leaning over and grabbing the salt.

"Hey, don't take the salt!"

Tsuyoshi lunges for the salt, Lucilia yelping in shock as Tsuyoshi's hand slams into hers.

Lucilia freezes as Tsuyoshi does, both of them looking at each other. Tsuyoshi's clock, on full display, was flashing 0:00.

Lucilia's words, printed in yellow and purple, glare up at her mother.

Her mother smiles, leaning forward and shoving the platter of fish onto the ground.

"Well!" Killing intent blasts from the room. Kaida, unaffected thanks to his mother, keeps eating. Everyone else freezes at Mukuro's and Kyoya's KI blasting at each other. "It's a wonderful thing, soulmarks! Much less complicated than soul clocks."

Mama smiles, making everyone freeze as Murderous Intent flows from Mama. Nobody can replicate the feeling that Mama can make, that makes one think that someone is about to be gruesomely murdered.

"Isn't that right, Hibari-san, Mukuro-koi?"

Mama whispers it.

Mukuro simply sits back, looking annoyed. Kyoya storms out of the room.

The MI vanishes.

~:~

It's not long after that that the younger Vongola generation were taken hostage at their school.

Tsunayoshi can't risk sending the Varia in – they don't have a subtle bone in their bodies. CEDEF is out, because Hibari isn't there.

"I have no idea how to do this," Tsuna sighs, frustration evident.

"You're forgetting one thing, Tsu-na-yo-shi~," Mukuro purrs, bringing the Tenth's head up, encircling his wife's hips. Naruto and Mukuro are both at the meeting; Naruto because she wanted to hear about it. "There's nothing that gets between my wife and my children."

"All you have to do is say the word, Vongola," Naruto smiles, fluttering her eyelashes. "Do you want to make your rule absolute? Or let them take out your children easily, hmm?"

"Annihilate them," the Decimo said without hesitation. "Send a message to the world."

Naruto moves, sliding off of Mukuro's lap. She bows, overdramatic and fluid.

"As you wish," she purrs, looking up with ruby-red eyes.

~:~

The Vongola Eleventh generation aren't terribly afraid. Kaida is perhaps the one who was the most, not technically being Vongola.

Even so, he trusted that his mama would come for them.

Lucilia chuckles softly, holding Kaida closer.

Kaida glances at her.

"Mama's coming," she told him. "Mama and Papa are going to show you they'll protect you."

Kaida smiles.

Laughter comes from nowhere, echoing around the room where an echo shouldn't be possible.

"You've made a mistake," Mama's voice floats from one side.

"You can't hide from us," Mama says a second later from the opposite side.

Mist Flames enter the room – Storm Flames blaze.

Mama sits on a desk, holding a trident. Heterochromatic eyes and Papa's signature grin stretched across her face indicate Mama's being possessed.

Mama gets possessed whenever Papa's angry with her, or vice versa.

(Privately Kaida thinks that it's normal. It's creepy to the other members of the Eleventh, but Lucilia can do the same to Tsuyoshi as a pure Mist.)

"Maa, maa," Mama says in a laughing voice. "You think you can steal from Vongola and us?"

Mama vanishes, draping an arm – the one not casually handling the trident – around one of their necks.

"Nobody takes them."

Instantly, Mama's face goes murder-y. Kaida makes a noise, seeing a flash of silver. His eyes are the only ones in the room, other than Mama's own, to be able to catch the start of her killing him.

Lucilia hides his eyes from the blood.

~:~

The whispers never fade, not when the line of Uzumaki Mukuro lives.

The Married Monsters, they're called in the mafia, years after the original couple dies. The Demon Duo is the next title to go out to Lucilia and Tsuyoshi.

There were whispers, whispers that said Mukuro's soulmate was from another world.

Warnings were given.

Don't let the Married Monsters get you, the warning started. Don't piss off the Vongola. Don't take children.

The school that burned down, they said, was the spawning site for monsters.

Nobody built over it for a long time.

Until, about three hundred years later, a blonde woman gave birth to a child in the newly built hospital. The woman died, the father died not a few days later in another room as a result of an accident.

A few rooms away and the same day as the blonde child's birth, a purple-haired set of twins were born.

One had a heterochromatic eye.

The two babies were set near each other.

This little blonde girl had no Flames – would never become Active. Many people had word-soul marks now.

This girl was the descendant of Hatake Kaida.

This boy was descendant of some random fool who had zero connection to the Italian mafia.

The girl was named Naruto. The blonde woman had loved the story of her ancestor Kaida being taken in by a woman named Naruto.

The boy was named Mukuro, an attempted to demonize him.

Why, hello there, little monster.

The words on the girl's arm were confusing. What soulmate would say those words to her?

The boy's soul-clock indicated he wouldn't touch his soulmate for another ten years.

(The cycle begins anew.)

~:~

So... I hoped you liked it. I did my best!