~Serafall Leviathan~

Although Serafall always came to Kuoh for Parent's Day in Sona's school, to not miss the opportunity to fluster and embarrass Sona. Today, she also came with an ulterior motive in mind.

She needed to meet the boy that has been the source of much chaos in the underworld. To be perfectly honest, despite having witnessed him fight Riser herself, she still struggled to wrap her mind around his existence. The boy was a proper monster.

And she fought in the war with Sirzechs and Ajuka. If that doesn't tell you enough, it really should.

Less than 2 months of being a devil, and he singlehandedly beat the 3rd son of the Phenex family to the point where he was still too scared to leave his house. Rumours spread that they couldn't bring iron cutlery to his room without him vomiting.

And as if that were not enough, he, as a reincarnated devil-human, took hold of the Durandal and slayed Kokabiel, one fo the Cadre of the Grigori.

Sure, Kokabiel was not that strong among his fellow Cadre, with his ambitions and pride far surpassing his power at the best of times, but he was still a Cadre!

The most interesting part, however, was his so-called Bloodline Ability that, if she were to be honest, far surpassed even the best of the Pillar abilities if Ajuka's speculation was correct.

So she decided to take it upon herself to meet the boy first and get a handle on him; she knew the Old Satan faction was already eyeing him. Thankfully, other than the fact that he was a total heartthrob and her type, he was very amicable. Which was to be expected from Rias-chan's peerage. And he had some sort of regal aura around him too that she just couldn't ignore.

...And her perception of him was totally not skewed by the foodgasm that she just experienced. Her panties were still uncomfortably drenched.

Taking another bite of her pancake, she suppressed her delighted moan to ask the boy about his ability to hear them from the man himself. Usually, how people talked about their abilities revealed a lot about themselves.

"So, Yukimura-kun. What's your ability anyway? I saw you do a bunch of things, but I just cannot pinpoint exactly what it does."

He chewed his own pancakes without cumming, the freak, before answering with a nonchalant tone.

"It's pretty weird honestly. I basically randomly get anything ranging from items, abilities, alterations to my body and such things after doing accomplishments and noteworthy feats. Like an achievement system in a video game, or like gods rewarding their champions. But I'm pretty sure it's not sentient."

Serafall lost words for a moment with just how blunt and forthright he was. But it was definitely a great change of pace as opposed to doing the old verbal dance with bastards so old they might as well be dust.

"Hmm, that sounds pretty powerful. Like that cool devilish transformation you have? What are your favourite ones? Your favourite items? Any magical girl transformation wands?"

She threw in some wild questions in there to not seem too invasive, but he did not seem to mind.

"You are talking about Devil Trigger, it basically turns me into what I can only describe as like a monsterised version of a Devil, increasing everything that makes me a devil to the max and then it turns it to overdrive. My favourites are probably Chaos Observer, which allows me to slip into the void dimension, and Devil Trigger itself; they never run out of synergies."

Serafall nodded her head. That was definitely, absolutely and positively nuts. She did not even know what the Void Dimension was, but she doubted he could explain in a way she could understand. But if that ability could be passed down through bloodline...

Well, plenty of Devils would offer up their daughters to his peerage in a heartbeat. He may be a low-ranking devil right now, but that wouldn't last the month. She and her fellow satans had already discussed among themselves-

"And if you are talking about magical girl wands, I have this-"

Saying that, he pulled out a beautiful crystaline wand emitting power very familiar to her as Serafall froze.

-And leapt over the table, grabbing him by the collar and shaking him like he owed her money.

"A magical girl's wand!? Was Yu-Gi-Oh not enough!? Just how much do you plan to upstage me!?!? Are you going after Sona next, you beast!?!?"

He was stealing her whole flow, bar for bar! It was apparently not enough that his Yu-Gi-Oh thing was spreading around the Underworld like a wildfire, but he was also moving in on the Magical Girl business!?

Was he trying to make her bankrupt and homeless!?!?

"W-what? Yugioh?"

Serafall released him and clutched her head.

"My views are already dropping because all of the youth are busy eating hot chip and running Blue-Eyes decks! Are you planning to steal my show too with your magical girl stuff!?"

Yugioh was threatening to upstage her! She had been trying the Magical Girl business for years, yet Yu-Gi-Oh, which hadn't been out for a week, was the new fad.

The worst part was that she was a part of it! She was still stuck on the Duel Island arc! Because of Gigasus, that cheating bastard!

The madly confused boy put his hands up in a sign of surrender and gave her an adorable, nervous smile that calmed her down, mostly due to how adorable it was.

"Uhh... Is Yu-Gi-Oh that popular?" The sheer gall to act like he didn't know, as if he were mocking her.

"What do you think!? Everyone is busy playing that game to watch my show!"

Serafall knew she was being unfair, but she was overstressed with work recently, with handling her show, the Grigori, the peace negotiations and everything else. And that Thousand Eyes Restrict just made everything more frustrating!

No, she refused to use a lower difficulty!

"...Maybe we could do a collab if you wanted? It should benefit both of us, right?"

Serafall stopped in place as she regarded his words.

...Seeing herself in Yu-Gi-Oh did sound very fun. Was he offering that for real?

"How would you do that?"

He seemed to recover his wits as he sat upright, still very nervous in front of a temperamental Satan.

"A new Magical Girl card archetype and a DLC section? You could even pose for it and voice-act yourself."

...Shit, he was good at this.

This devil boy was not even a tenth of her age, yet he already had her in the palm of his devilish hands. A natural savant at negotiations, being able to accurately grasp his opposition's weakness and placate them seemingly effortlessly.

"Alright! Deal! Add me in, and all transgressions will be forgiven! I'll even let you make a guest appearance in my show!"

In truth, she really wanted to be included in the game. I sounded cool as hell, and she already really liked Yu-Gi-Oh. And she really wanted to play against herself.

Yuta took her outstretched hand and shook it with some hesitation and a nervous smile.

"S-sure. I'll uh, contact you about the details later."

Serafall shook on the deal with a satisfied smile, having had a good gauge of the handsome boy's character before he stopped her one last time.

"Before you go, Lady Leviathan. I forgot to ask you, but what is the 'Sea Serpent of the End'?"

Serafall tilted her head in confusion as to why he would ask that, but answered regardless.

"Huh, that's a little obscure. It's the ability of the Original Leviathan, which allowed her to turn into a massive sea serpent and control water on a massive scale. Why do you ask Yuki-kun?"

Not minding her affectionate nickname, Yuta looked quite awkward about something else, scratching the back of his head and averting his eyes.

"This is gonna be awkward, I can kinda use the same ability."

Serafall blinked.

"You what?"

"Yeah, I have an instinctual handle on my abilities, even knowing their names too. When I use too many of my Water-Based Abilities together with Devil Trigger, it naturally becomes Sea Serpent of the End."

Her mind ran faster than ever as she realised what he was talking about. The pieces clicked.

His regal Aura, his ability to transform into a Primordial Devil form and the Sea Serpent of the End.

Was... Yuta, the son or a descendant of the Original Leviathan somehow? Even if he was not, he had to be connected somehow. How he was connected did not matter; what did was the fact that he actually inherited the ability, unlike the current leaders of the Old Satan Faction.

This could change a LOT.

Despite their best efforts, the Devil Race was still divided from the civil war, especially the nobles, due to the amount of respect and importance they put on bloodlines; they refused to acknowledge them, the New Satans, on the basis that they were not relatives of the Original Satans. And so emerged a new faction called the Old Satan Faction, who were led by relatives of the Original Satans.

Their conflict was already at its peak, and the Devil Race did not look like it would survive another civil war so easily. If the civil war did not end them, the opportunists who saw their weakness would.

The crux of the issue was that the New Satans were not related to the Original Satans, and none of the relatives of the Original Satans respected them. So, what if, somehow, the New Satans were related to the Old Satan faction?

It would sway and pacify a LOT of the Old Faction in that case if she were to, like, marry Yuta. It would establish them as the legitimate successors if one of the New Satans were the wife of the son of the Leviathan and the Sea Serpent of the End. Especially when they themselves carried the blood of Leviathan in their womb.

Serafall shook her head. She was getting too ahead of herself. She accidentally turned on Satan mode when wearing her Magical Girl outfit.

"Yuki-kun, you are absolutely sure about this?"

Judging by his absolutely dumbfounded expression, it seemed so. He didn't seem to grasp the scales enough as a reincarnated devil to know the ramifications of what he said. And no one was dumb enough to joke about something like that.

"Yeah? I can show it to you if you want."

She shook her head; she did not want this slipping out in any way. She put her hands on Yuta's shoulders and looked him in the eyes.

"Yuki-kun, I need you to do a favour for me. Never, EVER use that ability before I tell you to, okay? It's for a really important reason."

Despite not knowing anything, he nodded.

"Sure, if it's that important to you, I don't mind. It's not that efficient anyway."

Argh! She felt physically hurt by his trust in her, even if she looked like a weirdo in front of him.

He was so her type, too!

She inched her face even closer with an intense look. For the safety of Devil Kind.

"Yuki-kun, be honest with me. Would you marry me if I proposed to you?"

"What?"

"Sorry that was a strange thing to ask. Anyways, thanks for telling me all of this, Yuki-kun~☆! Here is a reward from me for taking up so much of your time!"

Seeing no blatant rejection of the prospect, Serafall smiled. And then, deciding to be bold, she placed a quick kiss on his cheek.

"Now then, I gotta go and interrogate Ajuka and Sirzechs. See you later, Yuki-kun. Oh, and you can keep this as a souvenir!"

Serafall peeled her cum crenched panties off and placed them gently on the table in front of the still frozen Yukimura with a teasing smile. It would be too uncomfortable to keep wearing it anyway. Might as well use it to fuel his teenage hormones.

After all, not a single young devil hadn't dreamed of her. He should be honoured!

She created a summoning circle on the ground and struck a cute pose.

"Bye bye Yuki-kun! See you later~! Levia☆tan out!"

And Serafall vanished.

♢—•♧•—♤—•♡•—♤—•♧•—♢

~Yuta Yukimura~

What the fuck?

A/N: Serfall is being Serfall as always. What did you expect? But you probably did not expect Yu-Gi-Oh to have a stranglehold on the Underworld already. Seriously, they must be starved for entertainment down there. And Yuta cannot handle her sheer Levia☆tan energy.

Speaking of Leviathan, yep, that one synergy came back to bite him in the ass. Hard. The slip-up he made here will have massive, massive ramifications, and along with them, shenanigans. What did you expect when he had the traits Esper, Demon Lord, Poseidon's Kiss and then managed to synthesise Sea Serpent of the End? Anyway, what did you guys think about this meeting? I'd love to know.

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