The clock had barely crawled past 4:00 a.m. when Furuichi's misery began. He was yanked out of a blissful dream about a tropical island paradise—sun, girls, drinks, and zero delinquent drama—by the suffocating grip of Alaindelon.
"Good morning, Furuichi-kun!" the transport demon sang in his booming voice.
"AAAAAAHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH!" Furuichi's scream echoed through the quiet suburb, then cut off as both of them vanished in a blur of teleportation.
They reappeared in the open courtyard of Ishiyama High, the cracked pavement underfoot vibrating faintly. Furuichi slumped on the ground, his hair sticking out in ten directions.
"WHY," he croaked, pointing at Alaindelon, "do you always teleport me when I'm half-asleep, in pajamas, with no warning?!"
"Because it builds character," Alaindelon replied matter-of-factly, then turned dramatically toward the rooftop of the school. "Behold! The clash of fates is about to begin."
Standing nearby, Hilda folded her arms, cold gaze fixed forward. Lamia yawned, leaning against her, while Forcas Rachmaninoff adjusted his glasses, notebook already in hand to document the battle.
"...Why are you people even here at this hour?" Furuichi muttered, then stiffened as the ground shook.
Up above, on the rooftop, the stage was set.
Oga Tatsumi stood, Baby Beel perched on his head like always, sparks already dancing around them. Across from him loomed Toujo Hidetora, his aura calm but heavy, the kind of presence that made even veteran delinquents hesitate.
And on the sidelines leaned Kogen, arms folded, his sharp features illuminated by the faint glow of the fireworks' leftover smoke. He looked perfectly relaxed, like a spectator at a play.
"Go on, darling," Kogen murmured toward Beel, his voice soft enough for only those close to hear. "Watch your father show off."
Baby Beel clapped his tiny hands, already hyped.
Meanwhile, not far from the courtyard, Kanzaki, Himekawa, and Shiroyama confronted Aizawa and Kaoru. The two of Tojo's men cracked their knuckles, smirking.
"Still planning to get in our way?" Aizawa taunted.
Kanzaki, bloody already, spat on the ground. "Hell yeah."
Himekawa's fancy jacket was shredded, his hair disheveled, but his eyes burned stubbornly. "You think we'd just bow down? Not a chance."
Shiroyama cracked his neck, standing firm beside them.
The clash was brutal, fists and feet slamming into bodies, bones rattling with each hit. Aizawa and Kaoru overwhelmed them easily, knocking them down again and again. But every time they fell, the trio dragged themselves back up.
"Persistent bastards," Kaoru muttered, irritated.
Before he could swing again, however, a quiet voice cut through the noise.
"Persistent's one thing."
A shadow blurred past them. Kaoru's body hit the wall with one blow, unconscious before he could react.
Natsume stood where he had been, casual as ever, brushing off his hands. His eyes lifted toward Aizawa, calm but sharp. "But some fights aren't yours to win."
Aizawa's grin faltered.
On the other side of the school, Kunieda and the Red Tails had already mopped up the groups of delinquents flooding the halls. Kunieda wiped sweat from her brow, adjusting her sword.
"Everyone, move!" she ordered. "We're going to the roof!"
The girls cheered, rushing after her.
The rooftop battle had begun.
Oga lunged first, his fist carving through the air with the force of a cannonball. Toujo blocked with his forearm, the impact shaking the ground beneath them. Dust rose, cracks webbing across the concrete.
"Not bad," Toujo said, his grin widening. He swung back, a haymaker that Oga barely ducked, the wind of it ripping tiles off the rooftop.
The fight was raw power against raw power, no tricks, no hesitation. Fist met fist, kick slammed into ribs, heads clashed hard enough to split skin. Each blow rang out like thunder, echoing across the schoolyard.
"Holy crap..." Furuichi whispered from the courtyard below, his eyes wide. "This is insane. They're gonna kill each other!"
Hilda didn't blink. "That's the point."
Kogen tilted his head, watching with amusement. "They look good together, don't they? One stubborn delinquent against another. But only one of them's truly a father."
His eyes softened on Beel, who was bouncing with excitement, sparks flashing around him.
The fight raged on, Toujo pressing Oga harder and harder, his blows precise and devastating. Oga's face was bloodied, his shirt ripped, but he refused to back down.
Beel trembled, little sparks forming around his body. His eyes went wide as Oga stumbled under a crushing hook from Toujo.
And then—
"DA!" Beel cried, thrusting his little hand out. The Zebul Spell erupted across Oga's arm, glowing with wild power.
Everyone froze.
Even Toujo's eyes widened, his grin faltering. "That mark..."
From the sidelines, Hilda narrowed her eyes. "So they both finally did it."
Kogen smirked faintly. "Darling, you never cease to amaze me."
The air vibrated, the Zebul Spell surging like fire. Oga blinked at his glowing arm, then glanced up at Beel.
"...Tch. Don't interfere." His voice was rough but steady. He lifted his arm high, the glowing mark pulsing. "I said I'll win. So leave it to me."
Beel blinked, then slowly lowered his hand. The Zebul Spell faded, sparks dispersing.
But the fight didn't stop.
Before anyone could breathe, a whistle shrieked. Lamia, distracted, had tripped over the fireworks crate. A single rocket shot straight up—then curved directly toward Oga and Toujo.
"Oh, crap," Furuichi squeaked.
The firework hurtled down, a flaming spear of destruction.
Oga didn't hesitate. He turned, caught the rocket in his bare hand—and crushed it. Fire bloomed, exploding outward. The flames twisted, coiling, shaping themselves into a massive Zebul Spell sigil that blazed across the entire rooftop.
Everyone stared, mouths open.
Oga stood in the middle of it, his eyes wild, fire licking at his skin.
"Let's finish this," he growled.
The battle raged until dawn.
The sky paled, stars fading, replaced by streaks of orange. Oga and Toujo were bloodied, battered, neither giving an inch. Each strike was enough to shatter walls, each impact loud enough to shake the building.
Toujo slammed Oga into the ground, his fist raised for the final blow. "This ends here!"
But Oga twisted, his arms locking around Toujo's waist. With a roar, he spun—lifting the giant of a delinquent clear off his feet—and suplexed him straight into the rooftop.
The concrete cratered. Dust exploded outward. Toujo's body hit the ground hard, the sound echoing like a gunshot.
Silence.
Then Oga pushed himself up, panting, Beel perched on his head once more.
"...Told you, brat," he muttered, voice rough. "I won."
Beel squealed with joy and launched himself onto Oga's face, tackling him to the ground.
Kogen chuckled softly from the sidelines. "Well done, little darling. And well done, darling."
Toujo lay flat, staring at the sky. Slowly, he began to laugh.
"You're strong... stronger than me."
He lifted a trembling hand to his shoulder, where the Zebul Spell tattoo marked his skin.
"You know... there was a guy I looked up to. He taught me what fighting meant. He had this mark. So I inked it on myself. Wanted to be like him. Strong like him."
He looked over at Oga, who was sitting up with Beel clinging to his head.
"...Guess you're that guy now."
Oga scowled but didn't argue.
Toujo's laugh echoed into the morning. "You're the strongest at Ishiyama."
But before the rooftop could settle, Beel squealed again—louder this time, sparks erupting wildly. His tiny body glowed, overexcited by Oga's victory.
"Wait—!" Oga barked.
Too late.
A surge of demonic power erupted from Beel, blasting outward in a shockwave. The rooftop cracked, walls buckled, windows shattered.
The entire school collapsed in an explosion of rubble and smoke.
As the dust cleared, Ishiyama High was no more—just a smoking crater.
Furuichi stared at the ruins, slack-jawed. "Oh my god. We're all dead. Our parents are going to kill us."
Hilda sighed, brushing dust from her dress. "Idiot."
Kogen only laughed softly, brushing debris off his shoulders. "Well... darling does have a dramatic way of celebrating."
Beel clapped happily from Oga's head, completely unfazed by the destruction.
And as the sun rose over the ruins, one truth was undeniable:
Oga Tatsumi was now the strongest at Ishiyama High.