In the Student Council room of Kuoh Academy— a room usually filled with order, discipline, and the elegant "Sona Shitori" aura— a pop sound echoed like a cheap teleportation effect from an old anime.
In an instant, Serafall Leviathan was already standing in the middle of the room.
With… a costume.
That costume.
A black-and-white short skirt, a big ribbon, mismatched stockings, and a mini coat covered in glitter— the idol witch costume that, in the devil world, was already known as a symbol of moral disaster.
The Student Council members, most of whom were from the Sitri clan— normally graceful and aristocratic— immediately turned into a group of panicked beings who didn't know where to look.
"SE–SE–SE… SERAFALL-SAMA!?"
Sona Shitori— who had been holding an important document— slowly put it down. Very slowly. Like someone who was already accustomed to tragedies that arrived in the form of her own sister.
Serafall instantly hugged Sona from behind.
It wasn't a gentle hug, nor a warm hug… it was a "maximum siscon" hug, one that could crush the spine of a normal human.
"Sona-tan~! Onee-chan came so fast because your report was soooo serious! Are you okay? Are you hurt? Are you stressed? Are you eating properly? Do you need Onee-chan to—"
Sona closed her eyes.
Sighed.
"I… I'm fine, Onee-sama."
The Student Council members watched the scene while desperately trying to maintain their noble dignity. They failed, of course. Some even looked like they were about to cry from the psychological pressure.
Serafall released the hug, then spun around and faced the entire Student Council like a war general giving a speech… if that war general was wearing a magical idol girl costume.
"So! Where's the full report about the super dangerous Qi user who wiped out the fallen angels and made two Young Kings panic? Onee-chan has to check it! For Sona-tan!"
Sona raised a hand, pointing at the table.
"Over there. And please… don't overdo anything."
Serafall looked at her— eyes sparkling with excitement, never a good sign.
"…Onee-chan can't promise anything!"
Everyone in the Student Council felt something far more dangerous than a diplomatic threat—
Serafall when she's curious.
That aura spread through the air like a natural disaster warning at Leviathan level.
After reading the report for several minutes— which for normal humans might look ordinary, but for devils was equivalent to reading notes on inter-racial terrorism— Serafall nodded with a serious expression… still adorable because she was wearing a glittery idol costume.
"Hmmm… I see. A mysterious man with strange energy, abnormal power, not registered anywhere, and slaughtered fallen angels in seconds…"
She flipped through the pages.
Her eyebrows rose.
"…and he calls his name Cheon Ma?"
Sona nodded. "Correct. Do you know something?"
Serafall lifted her finger with the expression of a child discovering treasure.
"Sona-tan! This name… it comes from Korean writing, you know!"
The Student Council members glanced at each other.
Sona's expression was disbelief.
Not because the information was wrong, but because… she couldn't believe she hadn't realized it.
Serafall didn't notice the stares. She was already grabbing her phone, opening Google, and typing with a speed that would make Koneko—who wasn't even in the room—feel challenged from afar.
"Wait a second! Onee-chan will look it up on the internet!"
Sona massaged the bridge of her nose.
'I… am one of the smartest devils of this generation. Why is my sister faster by just Googling it?'
A few seconds passed.
"Found ittt!!" Serafall shouted like a VTuber finding a meme. "So… Cheon Ma… means…"
She tilted her glittery cute face.
"…Heavenly Demon."
The Student Council room froze.
Some Student Council members—already stressed since earlier—began sweating cold. The word "Demon" was normal for devils, but when combined with "Heavenly"… it only produced one logical reaction:
A divine-level theological crisis.
Serafall stared at the screen… and then—
"Huh? … EEEEHHH!??!"
Almost the entire room jumped.
Even the premium-quality meeting table shook under the shockwave of a panicking Maou.
...
A few hours after the commotion in the Student Council room, all the related parties were now gathered again in the ORC Club room. The room was full—not just full of members, but full of collective anxiety wrapped in a tense yet absurd atmosphere.
Rias sat in her chair with her arms folded, while Akeno stood beside her with a gentle smile, though her eyes were clearly alert.
Sona and Tsubaki occupied the other side of the table, accompanied by Serafall who… for some reason was now wearing yet another different magical girl costume.
Everyone's focus was locked on one topic:
The mysterious masked man who called himself Cheon Ma.
Rias opened the discussion, her voice filled with mental exhaustion.
"So you're saying he's that Cheon Ma!?"
Serafall nodded rapidly like a broken electric fan. "Yes! That one! The one from manhwa! The one who usually has long hair, cool clothes, and a super edgy aura! The one—"
Sona stopped her sister with a small cough. "Onee-chan, please… calm down a little."
Serafall immediately sat down nicely. Or… as nicely as a panicked Maou could appear.
Rias massaged her temple. "But… I don't think he's the real version from the manhwa. The Murim world doesn't exist in this world."
Sona nodded. "Correct. Our power system only recognizes magic, demonic power, holy power, senjutsu, youjutsu, and other energy variations. But murim? Pure Qi at absurd levels that can destroy buildings just from breathing wrong? There's no record of it."
Akeno cut in with a thoughtful tone. "But… his power? The pressure from his energy is clearly not magic, not demonic power, not even senjutsu. It's something… we've never seen."
Kiba, who had been silent this whole time, finally spoke. "Then… what about the possibility he's just pretending? Murim is popular lately among humans. There are a lot of manga and manhwa about it."
Sona frowned. "But energy pressure like that… can't be faked."
Serafall raised both hands high.
"What if he's a cosplayer who takes his role too seriously!? So seriously he can actually massacre fallen angels!? That's— that's— not normal!!"
The entire room stared at her with the same expression: true, but please don't shout.
Sona looked around the room and let out a long sigh. She knew everyone was thinking the same thing.
Why were they, supernatural beings who had lived hundreds to thousands of years… panicking over a concept from human fiction?
The answer was simple:
Because the concept shouldn't be real.
And precisely because it wasn't real, its appearance… felt more dangerous than any threat.
Even Serafall—Leviathan, one of the youngest yet strongest Maou—shook her head with a confused expression.
"I've lived thousands of years in the supernatural world… but 'murim'? 'Heavenly Demon'? I don't have anything about that in my brain's database~."
Silence blanketed the room.
Everyone realized one thing:
If even Serafall Leviathan knows nothing about something… it's not normal. It's a problem.
And that problem… now wore a white mask, radiated black-red Qi, and called himself:
Cheon Ma.
...
Sirzechs Lucifer was sitting in his office— which for most of the supernatural world was considered the most sacred, dignified, authoritative place filled with the aura of the devil's leader.
But for Sirzechs himself?
Well… it was just the desk of a god-level office worker who got slammed daily with reports, documents, and diplomatic letters in absurd quantities.
He had just finished a stack of reports tall as a mini-monument when a magic circle—bright pink, a color that did not respect the office atmosphere at all—popped softly beside his desk.
"Zechs!! Zechs!! You! Have! You! Seen! The! Report! About! That! Incident!?"
Serafall Leviathan's voice smashed the room's silence like a meteor overdosed on energy.
Sirzechs closed his eyes for one second.
'—Damn. This year I had only three days of peace. Why does hope always betray me?'
With a tone that was somehow still calm, he replied, "Serafall, can you lower your voice a little? My office is still intact and I want to keep it that way until the weekend."
"But this is important!! Super important!! Ultra urgent!!"
The magic screen displayed Serafall in her glitter-filled magical girl costume— a costume cursed by many demonologists as "an entity that violates devil aesthetics." Glitter followed every one of her movements like wild particles with minds of their own.
Sirzechs sighed—the sigh of an older brother who had grown immune to all the world's insanity except two things: his sister and the hyperactive Leviathan.
"Alright… which report?"
He asked only out of formality; a man as smart as him clearly already knew which report she meant.
"The one about that new human! The one called 'Cheon Ma'! The— the— the one who could withstand Rias' pressure… casually! So casually, Zechs!!"
Sirzechs froze his hand mid-motion.
One of his eyebrows lifted— the classic Lucifer gesture that usually marked the arrival of a continental-scale problem.
In his mind:
'My sister pressured a human? Rias?'
He grabbed the report and read it at the speed of a Maou— which meant: fast, very fast, and still careful enough to catch even the trickiest devil contracts.
A few seconds later, his shoulders tensed.
"…Rias used her full mini-Raja Iblis-level pressure… and that human did not… collapse?"
Serafall nodded aggressively. "Yes!! Amazing, right!? Or terrifying!? Or— or maybe he's super duper cool!?"
Sirzechs rubbed his face.
'Please, Fally… this isn't about cool or not. This is about: will the world explode tomorrow?'
He read the next section.
"And his name is… Cheo Ma…?"
He brought the paper closer.
"…Cheon Ma… Heavenly Demon…? From Murim culture? From… human fictional literature?"
Silence hung in the air— the kind of silence born when two top-tier Maou simultaneously realized they might be facing a new kind of problem.
Serafall broke the silence first.
"Zechs!! Could he be the real one!? Like— from the— uh— manga!? Novel!? Webtoon!?"
Sirzechs had to restrain himself from looking at the magic screen like someone filming a mockumentary.
"…Serafall. The Murim world doesn't exist. Never existed. We've mapped three dimensions, eight realms of existence, and hundreds of races. There's no such thing as a human-martial-artist-heavenly-god."
"But Sona said her Student Council went into mass panic!! That means something, right!?"
Sirzechs wanted to explain that Sona's Student Council once panicked just because a notebook went missing— but family diplomacy strongly advised him not to say that.
He slowly closed the report and leaned back in his chair.
"I suppose," he said at last, "I need to speak with Rias directly."
Serafall nodded like a typhoon-powered fan.
Sirzechs let out a long breath— the breath of a world leader wondering why chaos always chooses the day he's in a good mood.
'Please… don't let this turn into a new diplomatic crisis. We just finished the vampire dispute. I need a vacation. I'd even join Serafall's cosplay if that would calm things down.'
He cut the communication.
Sirzechs stared at the report, now with the eyes of a man who had seen the future… and that future contained additional workloads.
"…Cheon Ma, huh? Let's hope you're just an ordinary problematic human."
Unfortunately, the instincts of a Maou who had lived far too long said otherwise.
'If even Rias couldn't make him flinch… yeah, this won't be "ordinary."'
Sirzechs Lucifer's workday was once again officially ruined.