Chapter 1: The Imperial Princesses (Lineage of the Phoenix Emperor)

A/N: This is the start of the sequel fic to Submit to Your New Fire Lord. Because Webnovel only allows twenty stories per account, it will be posted under the Submit to Your New Fire Lord fic.

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Fifteen years. Fifteen years during which he'd reigned as the Phoenix Emperor, ruling over the Phoenix Empire, or as some had taken to calling it, the Empire of the Sun. Because not only was its ruler a Firebender, but the Sun never set on Zuko's Empire, not anymore. Not when the Phoenix Empire encompassed the entirety of the world.

The years had been kind to both him and his people. And that was good, because there was no one who did not fall under that umbrella. Oh, certainly there were pockets of resistance here and there. Rebels who either wanted to go back to the old, outdated and antiquated way of doing things, or thought they knew best and could find a new and better way of doing things.

But even those people, the Emperor laid claim to. They were all his people… some were just more disobedient and treacherous than others. Like children, they squabbled and attempted to take, trying to claim all that they could for themselves at the expense of those around them. They even tried to claim that they were akin to the Phoenix Emperor in that way.

They were not the same. Zuko, as first Fire Lord and then Phoenix Emperor, had done everything he'd done for the sake of the world. The Empire he'd built was designed to not only put an end to the war that his forefathers had started, but also to bring an end to the division of the Elements perpetuated by the Spirits and the Avatar.

Oh sure, one might claim that the Avatar represented the combination of all four elements… but Zuko disagreed. He disagreed most stringently. The Avatar represented the hoarding of that power. And indeed, over these past fifteen years, they had discovered that it was MORE than possible to learn to bend multiple elements.

For a Firebender to then turn and become a Waterbender was not so easy… but for a Firebender to incorporate Waterbending into their Firebending and make Steambending, that was possible. Metalbending, Bloodbending, Icebending, Woodbending… the examples went on and on. Once Zuko had a willing Avatar at his side, working with him instead of against him, everything had become so much clearer.

Their world had been stuck in the Dark Ages, and the Phoenix Emperor had pulled them straight out, bringing them into the modern era where the sky was the limit and the only thing holding them back were their own preconceived notions about the way things SHOULD be because that was the way they always HAD been.

Well, Zuko had never been held back by that sort of thing. He was beyond tradition at this point. He was beyond censure. And his family… his family had only grown in this past decade and a half.

Sat upon a throne high up in the Phoenix Roost, a Palace to the Phoenix Emperor built on Crescent Island, Zuko sits back and watches with a small smile on his face as his firstborns show off for him. Kiyi and Kanna, his firstborn daughters by way of Ursa and Kya respectively. The two girls have grown into fine young women, and gifted benders each in their own rights. And both look… startlingly like their mothers.

Or rather, at their age they look more like Azula and Katara did, just over fifteen years ago. But personality wise… they are certainly their own women. A mixture of Zuko and Azula if he had to put a finger on it, is what he would say. Both young women were very eager to prove themselves, and they both had that ambitious streak that Azula had had, so long ago, before he'd put his sister in her proper place.

However, they also had a tempering to them. Zuko had made sure that while they were both pampered and treated according to their station, they were not spoiled. Instead, they were trained. Theirs was a hard life, with great expectations placed on both of them. Kya might have started out as his slave, but by the time she gave birth to Kanna, she was elevated far above that initial position. Likewise, Ursa might have been his mother, but she was first and foremost his concubine.

Both Kiyi and Kanna had every right to inherit some measure of his Empire. Zuko had no intention of dying any time soon, but the two girls were what they were… Imperial Princesses.

Of course, they were also both incredibly competitive. Right now, was an annual event of sorts. Every year, Zuko called his firstborns before him like this and had them show him their progress as benders in a glorious display of fire and water. Kanna was of course just as accomplished a Waterbender as her mother. Meanwhile, Kiyi was a very powerful Firebender, just like her father.

Each year, they would stand side by side and demonstrate this. Kanna would show off her flowing techniques, using water from an increasing number of pots to make intricate and artistic designs in the air, before ultimately freezing the water into ice spikes and sending them catapulting into far off targets. She'd started off with just one pot of water at the age of ten, the first year they'd done this. Now, she had ten pots sitting behind her, all filled to the brim for her to use.

Meanwhile, Kiyi would wield her inner fire with more grace and poise than Zuko felt even his forefathers ever had. His father in particular, had always been a man at war with himself. And though Ozai would never have agreed or acknowledged this plain and simple truth, Zuko knew for a fact that to truly master Firebending, one had to find one's inner peace.

Perhaps that seemed counterproductive, and certainly Ozai's mastery of lightning bending made Zuko's theory seem silly… except when you took it a step further, and realized Ozai never had the capacity to master his brother's technique of lightning redirection. Indeed, it was quite easy to shoot lightning, to half-fry yourself while doing so. It was another entirely to know yourself so thoroughly, and to be so still internally, that you could pass someone else's lightning right through you without being harmed.

Kiyi was a Master Firebender, even at her young, tender age. She had lightning bending and lightning redirection down pat. She was also becoming an accomplished lavabender in her own right, in the same way that her sister had mastered icebending. However, while they were equal in these two things, Zuko could already tell from the smirk on Kanna's face that this year would be different.

It was a little disconcerting, because he could see so much of Kya and Katara in Kanna's features. Her mother and big sister featured predominantly in the dark-skinned Imperial Princess' genetics. But that smirk on her lips… that was ALL Azula, if Zuko was being honest. That was his younger sister before he'd tamed her to a tee.

And so, he's not all that surprised when their demonstrations, done side by side, eventually come to a close… but not really. As Kanna finishes off by spearing some far off targets with ten ice spikes at once, and Kiyi manages to turn the incredibly dangerous lava she's been brought into a beautiful obsidian sculpture, there's a pause. Both Imperial Princesses bow, and then Kiyi begins to back away, moving back to her cushion to kneel on it once more.

Kanna SHOULD be doing the same… but she does not. Instead, she takes center stage, making Kiyi freeze in incredulity and budding frustration as her half-sister bows to Zuko again.

"If it pleases his Imperial Majesty… this humble Princess has one last demonstration for you."

Seeing the growing anger on Kiyi's face and knowing this was going to be a whole thing from the look of it, Zuko nevertheless smiles and waves a hand, giving Kanna leave to do what she's going to do. Smiling, Kanna reaches out and with a tug, pulls her ice spikes out of their respective targets. They fly through the air back to her, where they swirl around her head like a crown.

Then, to the shock of her half-sister, Kanna assumes a Firebending stance. Kiyi lets out a squawk of indignation, as in all of their years, the other Princess has never managed even one iota of the Firebending she should have inherited from Zuko. In all fairness, the old prevailing theory was that children who were 'half-and-half' so to speak, could only ever acquire one element from one parent.

That had been proven wrong, but it was still VERY difficult for a half-and-half child to unlock that second element. Indeed, it had been further theorized that after a child of two differing bending parentages started using one element, the other would be ten times as hard for them to even begin to use, let alone grow experienced in.

And yet, as one of the icicles floating around Kanna's head comes in close to her, the Imperial Princess finishes her Firebending Kata… and blows. She does not breathe fire, not even the shallowest of orange flames. However, her breath is hot enough that the icicle in front of her melts back into water on the spot, water that floats under her bending movements as she combines both the flowing of waterbending kata and the sharp movements of firebending.

Its decidedly beautiful, in a way, and Zuko can't help but lean forward, altogether impressed. One by one, Kanna melts the icicles back into water, reversing her performance and bringing back the artistic shapes of flowing water streams. Then, she goes a step further in the other direction, and begins steambending, right there on the spot.

The Court goes wild. They'd been speechless until this point, but now they're standing up and applauding, amazed to see what their Imperial Princess can do. Kanna stands tall as the steam around her dissipates, and the smile on her face shows just how pleased with herself is, even as she holds her head high.

Only one person isn't happy… but then, of course she wouldn't be. Still, even Zuko is both surprised and a little annoyed when Kiyi attacks Kanna from behind, the other Imperial Princess snarling as she punches a flame fist right into her sister's back, sending the other girl sprawling forward. To her credit, Kanna manages to roll with the punch, coming up onto her feet and spinning about as she drops into a combative stance.

Silence falls as the two of them circle around the center of the room, with Kiyi gritting her teeth and clenching her fists.

"You hid this from me on purpose! You continue to think you're better than me!"

Sniffing haughtily, Kanna just tilts her head to the side.

"Perhaps because I am better than you."

Kiyi's eyes widen, and then she shouts in rage and lunges forward, fire filling her mouth and hands.

"Enough."

Immediately, the fire gutters out and the Imperial Princesses both skid to a stop, turning and bowing as one to Zuko. The Phoenix Emperor has not moved from his throne, but one single word from him has been enough to stop the two of them in their tracks. They are well-trained and know better than to piss off their father. Indeed, in this moment he is not their father… he is the Emperor.

"Leave us."

This command, too, is followed immediately. Not by the Imperial Princesses, because it is not directed at them, but by everyone else in the courtyard. The Emperor's Court, as they were called, mostly made up of members of his harem and family, all file out, until its just Zuko and his two firstborns left.

Even their mothers, he sends away with a flick of his hand when Kya and Ursa both hesitate. In the end, the two women leave with only a couple of backwards glances, frowning in worry at their daughters as the Imperial Princesses stand at attention before him.

"It would seem that you two have come to blows… again."

In unison, they drop to their knees and prostrate themselves before him, as is expected of them.

"Deepest apolo-!"

"No."

He cuts off their apologies with a sharp word and an even sharper hand gesture.

"Rise."

Looking a bit more out of their depth, the two girls do as they're told, uncertain now and fidgeting more. Zuko looks between them… and sighs.

"It is time, I suppose. You will duel. One of you will emerge the victor… and be Crown Princess of the Empire. The other will retain her title of Imperial Princess… but be third in line for the throne."

Their eyes widen and their spines go ramrod straight as they both inhale sharply at his decree. This is it then. This is the moment they've both been anticipating for much of their lives. Zuko watches as they glance to one another, as if to see just how badly the other wants it. Whatever they see in each other's faces as they turn to face their half-sister… it only firms up their respective resolve.

"No maiming. No killing. Anything irreversible done to one… will be done to the other. Am I understood?"

Still staring at each other, the two girls respond as one, despite their division.

""Yes, Father.""

Zuko lets the silence grow heavy for a long moment… before grunting and bringing his hand down.

"Then begin."

Kanna and Kiyi need no further incentive to fight. They spring forth, and the two half-siblings begin doing battle with a ferocity that both impresses Zuko… and makes him wonder if he fucked up with their upbringing, somewhere along the way. The girls are both incredibly capable warriors, and though this is not a good arena for showing it off, they're exceptional stateswoman as well.

The Imperial Princesses are the envy of the realm. Girls want to be them, and boys fantasize about them. While they might seem reckless and foolhardy based on the events of today, in truth they both operate with poise and grace… most of the time. Zuko would say he's proud to have raised two gorgeous young women with bright futures ahead of them… but its clear from how they're fighting now that they don't seem to hold as much love for one another as he would have preferred.

… Where had he gone wrong? As Kanna pulls moisture straight out of the air and the ground, and Kiyi shears pieces from her obsidian statue to add a downright dangerous physical element to the fireballs she's throwing her half-sister's way, Zuko feels like he's failed, somehow. He just doesn't know what to-

For the first time in a long time, Zuko is legitimately caught off guard when his two firstborn daughters, the fruit of his loins, whirl on him as one in a display of incredible teamwork and fire lightning and ice at him at the same time.

Luckily, he hasn't gotten lazy. His instincts are as honed as ever, and he dodges out of the way without having to so much as think about it. His throne, however, doesn't survive, even as Zuko finds himself fighting for his life against his own flesh and blood.

Neither Kiyi nor Kanna looks particularly angry now… but they do look strangely determined as they face off against their father. Zuko doesn't bother to stop and demand in some haughty tone 'what the meaning of this all' is or anything like that. They don't exactly give him the chance to. From the moment their initial ambush fails, they go full tilt, attacking him with everything that they have.

Its still not enough. He's the Phoenix Emperor for a reason. That first strike of theirs, as surprising as it had been, was their best bet of winning. As soon as Zuko has its head in the game, it's already over. He thinks that his daughters know that too. He can sense a sort of finality in their movements, even if they're no less crisp then they were before. They're giving it their all, truly they are… and yet, they know they've already lost.

It ends with them on their knees before him, exhausted and beaten as they both look up at him, standing over them with his robes burned away, but not a hair on his head out of place. Clad in the armor beneath his ceremonial robes that he wears at all times, Zuko's jaw is clenched as he regards the Imperial Princesses. Finally, now that they're both beaten and at his feet, he can speak.

"And what, pray tell, was the meaning of THAT?!"

Exchanging a look between themselves, its Kanna who explains.

"Neither of us liked the idea of being beholden to the other, father. And so, we thought… what if we took the throne from you and ruled together. Sort of like you did with Grandfather and Great-Grandfather."

One of her hands clenched into a fist, Kiyi adds her own two cents.

"We decided… we'd either both be Empress, or neither of us would be."

There's a certain sense of fatalism in both of their tones. As if they expect him to execute them on the spot for their attempt on his person. Which… to be fair, was the fate that was served to most would-be assassins of the Royal Family in their lifetime. Zuko himself was seen as all but untouchable after the first few failures… and so his detractors and enemies had started going after his family instead.

Initially, he'd been willing to let attempts on his own life slide, even recruiting a few of the would-be assassins. If they were female, he was even more predisposed to recruiting them. But when they'd started going for the Royal Family rather than just the Emperor… Zuko had gotten mean.

As such, it wasn't surprising that in Kanna and Kiyi's living memory, they had only really ever witnessed Zuko pass a very final sort of judgment on those who would try to attack him and his. But of course… this was the first time that he'd had to deal with those from within the Royal Family itself trying to make an attempt on his life.

Tch, at least now he knew where he went wrong. He'd told only a handful of people the story of his rise to Fire Lord. It had taken place behind closed doors after all, with Zuko facing off against his father in an Agni Kai just for the right to live, as decreed by his Grandfather. In that Agni Kai, Zuko had taken his opportunity and killed both his father and grandfather, before ascending to the Fire Nation Throne.

He'd told that story to his daughters as a cautionary tale. What he'd had to do, no one should have ever had to do. And yet, clearly that wasn't what Kanna and Kiyi got from it. No, instead the two had apparently decided his actions were to be emulated. A conspiracy to usurp his throne, coming from his own children…

Both of them have their heads lowered and their necks bared, as if they expect their own father to drive a blade of fire through their napes at any second. Zuko breathes in deeply… and then exhales, shaking his head.

"The teamwork you accomplished… setting aside your differences and working together towards a mutual goal… I would be congratulating you, if your goal had been anything else. But knowing that you sought to supplant me, destabilize the Empire, and try some sort of dual rule that would likely have seen all that I built fractured and divided before the end of your lives… makes it clear to me that neither of you are fit to be Crown Princess. Nor will you ever be fit for the role."

Their shoulders slump, but Zuko isn't done.

"You are both disinherited, effective immediately. You are no longer Imperial Princesses. You are no longer my daughters."

THAT gets a more severe reaction, their heads whipping up and their eyes wide.

"N-No! Just kill us! Please, don't exile us!"

"I would r-rather die then live in such disgrace, father!"

Zuko raises a hand, quieting them both.

"I'm not going to exile you. You aren't even leaving the Royal Family. The two of you still have use… and you're old enough now to join your mothers as my concubines."

Reaching down, he frees the codpiece of his armor, and out flops his cock. Both Kanna and Kiyi immediately zero in on it, and Zuko can't help but smile. Those of his family, those of his blood… have a long tradition of submitting to those who have proved themselves stronger. Kanna and Kiyi are more like him and Azula then Zuko would have preferred… but in this case, he can use this particular trait that they seem to have gotten from his sister.

"Do you accept this punishment? Are you ready to start your new lives… as my concubines?"

For a moment, they hesitate. Then, exchanging a glance, Kanna and Kiyi bow their heads in unison.

"Yes, Your Majesty."

"Yes, My Emperor."

Good. He didn't entirely know what he was going to do if either of them had said no. Probably fuck the other in front of them until finally, they broke. As is, he steps forward and winds his hands through their hair, both Kanna's lush Water Tribe locks and Kiyi's straight, Fire Nation strands. He grips down harshly, fisting their hair in his hands and yanking them both forward.

As they gasp and reach out for him to steady themselves on his legs, their breath ghosting across his cock on either side as it begins to twitch and grow hard, Zuko barks out an order.

"Hands free. Put them behind your back and keep them there. You raised those hands in violence against your Emperor. You should be happy to still have them."

With great speed, both Kanna and Kiyi put their hands behind their backs, clasping their forearms and effectively restraining themselves for him. It leaves just their mouths to pleasure his cock, as he brings their heads in close using his grip on their hair. Faces flushed, eyes crossed trying to stare down at either side of his throbbing length, the two young women let their tongues trail out and begin licking up and down his shaft.

Zuko isn't surprised at how easy this is. In fact, he should have seen this all coming a mile away. He'd been receiving reports of Kanna and Kiyi's… experimentation for some time now. They'd been playing with one another, learning the sexual arts off of each other. Ursa and Kya had even mentioned that they liked to roleplay, with one of them playing him and using sex toys to dominate the other. Supposedly, they took turns based on who could win in the day's sparring.

That should have clued him into the idea that his daughters were a pair of lecherous father-loving perverts. Hell, it should have clued him into the fact that they were more companionable then competitive. But he'd assumed that like everything in their lives, they'd simply made the sex part of the competition, that it was more akin to hatefucking than anything else.

No, instead they'd gotten so close that they'd conspired to overthrow him. Now here they were, knelt before him with their hands behind their backs, sucking his cock. Frowning, trying not to let on how much he's enjoying their work, Zuko eventually pushes into Kanna's mouth first, forcing Kiyi to descend down to his balls instead as he begins to bounce Kanna's head up and down his length.

"Gagkh! Gagkh! Gagkh!"

He only throat fucks her for a second however, before switching it up and doing the same to Kiyi. Kya and Ursa's daughters both take his cock down their throats with a surprising amount of aplomb, choking and gagging and gurgling away at his dick, but at the same time, clearly ready for it… almost anticipating it, even.

"Glughk! Glughk! Glughk!"

Was Zuko wrong, to think that they wanted him to execute them earlier? Was this their ultimate goal all along? No… no, he decides after a moment. While it was clear that he'd allowed his family to become something of a blind spot over the last decade and a half, the truth was, he couldn't allow himself to suddenly become paranoid. He couldn't start jumping at every shadow.

Their fear when he'd seemed like he was going to exile them… THAT had been real. As real as their devoted cock sucking and ball slurping was now. Letting out a groan of enjoyment as he gets closer to his first release, Zuko just shakes his head. These two… he was going to have to keep a close eye on them, but if their efforts were anything to go off of, they actually wanted this more than they'd wanted to be Imperial Princesses. They actually preferred their new titles of Imperial Concubines.

That didn't mean he was going to go easy on them, however. As he reaches his peak, the Phoenix Emperor yanks his two disinherited daughters off of his cock and balls respectively, using his grip on their hair to press their dark and light faces up against one another. A moment later, he begins to cum and coats Kanna and Kiyi both in his seed as they close their eyes and stick out their tongues.

His load covers their faces, and then their tops as well. His seed soaks into their clothing, making a mess of their top halves. He cums and cums, and when he's finally done, they're both dripping with jizz. As he lets go of their hair, Zuko looks down at them both, kneeling there with their hands still clasped behind their backs, swaying back and forth in a lust-drunken haze… and he snorts.

"You're overdressed."

In a show of Master-Firebending that incorporates a hint of Airbending to support it, Zuko flicks his fingers out… and twin trails of blue-white fire flick out as well. Curving through the air with fluid movements more akin to waterbending, they lash out at the garments of the former Princesses… and without so much as singing a hair on either of their pretty bodies, they shred their formal, royal outfits to nothing.

Kanna and Kiyi are subsequently exposed to the Phoenix Emperor, his newest concubines' bodies on full display. Zuko admires them both for a moment, from the swell of their breasts to the width of their hips. His daughters have grown into truly gorgeous young women. And now… now, they will carry his children, to further the Empire they sought to forcefully inherit.

With a rush of hot air, Zuko continues to show off his not-quite Mastery of Airbending by causing Kanna and Kiyi to lift off the ground, and then come together in one delicious, nubile sandwich. Landing back on the ground with Kiyi on bottom and Kanna on top, Zuko steps up and kneels down behind them, placing his hands on Kanna's dark-skinned ass cheeks, and then moving them to her thighs to spread them and reveal both her and Kiyi's puffy, dripping wet pussy lips.

The two girls are incredibly aroused… and to be fair, so is Zuko. With a growl, he thrusts right into Kanna from behind, wasting no time in robbing his firstborn of her virginity. Though, is it truly robbing, in this case? He pulls out and does the same to his other firstborn immediately after, punching deep into Kiyi's quim and taking her hymen for his own. He claims their virginities right then and there, before beginning to fuck them both equally, his thrusts pounding in and out of their clenching, gushing cunts as they squeal and moan in abject pleasure.

He's still got it, that much is for sure. In mere moments, he has his daughters begging for more.

"H-Harder! Please, fuck me harder!"

"N-No! Me! Fuck me more! I need it, your Majesty! Fuck meeeee!!!"

Oh yes, decidedly more like Azula than he would have preferred… but alas, Zuko could work with this too. Just like he'd put his power hungry sister in her place by showing her that she couldn't possibly handle him even on her best day, Zuko would have to do the same with his daughters. Plowing into Kanna and Kiyi equally, groping and squeezing Kanna's ass cheeks while kneeling between Kiyi's splayed legs, Zuko gets closer and closer to his next climax.

"Clean each other off."

His order, coming seemingly out of nowhere, is nevertheless followed a moment later. Through the ferocious way that Kiyi and Kanna attack each other's faces, Zuko can see… the two half-sisters love each other more than either would probably admit. There's simply no denying it… they're enjoying this, and not just because Zuko is fucking them both through orgasm after orgasm, but because they're getting to enjoy his cock together, as their supple tits and gorgeous bodies writhe and undulate against one another.

As they gyrate their hips for his thrusting prick, they moan into one another's mouths, kissing deeply after cleaning one another's faces, despite Zuko NOT ordering that. Still, seeing how much they enjoy each other's company, Zuko comes to a decision right then and there. He can't exactly give them a reward for trying to usurp him, for conspiring against him… but he can give them a punishment that is actually a reward in disguise.

"Because the two of you are clearly so fond of each other… neither of you will be allowed to be pregnant without the other. Neither of you will accept my seed without the other present. And neither of you will bare any other man's children until you've borne my own."

With that decreed, Zuko finally begins to cum… but he doesn't stop thrusting. Instead, like a baker drizzling cream onto multiple pastries at once, he switches between their holes, punching into Kanna's quim to deliver a shot of his seed, and then into Kiyi's to do the same. In this way, he splits his thick, full load of hot, white, live-bearing cum between the two young women, filling each of his daughters' wombs with the same volume of semen.

When he's done and pulls back, Kanna and Kiyi… are still making out, thoroughly lost in the throes of passion. Zuko considers them for a moment, before rolling his eyes and smiling indulgently. He has Kya and Ursa called back inside, and explains the situation to his two older, more mature concubines while they kneel and clean up his cock, cleaning up after the mess their daughters left behind.

The two women have been in charge of some of Kiyi and Kanna's training up to this point, but now… now they will be in charge of a lot more, as the former Imperial Princesses are taught how to be Imperial Concubines instead. Meanwhile, Zuko is still Phoenix Emperor and still has an Empire to run all the same…

Still, what a way to start the year. Honestly, what was going to happen next? Hm, no, best not to say that out loud. He'd jinx it.

-x-X-x-

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