I am Him

After dinner, Maki Zen'in and Kurahashi Kyōko resumed their training, once again focusing on channeling and refining the magical energy Ren had introduced to them from another world.

Akiyama Ren watched the two with quiet satisfaction. Their progress was impressive, especially Maki's. Her Heavenly Restriction meant she lacked cursed energy, but with Ren's guidance, she was learning to wield foreign systems like magic through sheer willpower and physical prowess.

Still, while they trained with tireless focus, Ren found himself a bit… bored.

Hotarugusa was nearby, but she was too young for meaningful conversation. Sakurg, one of the older Onmyo operatives who managed household logistics, had the energy of a stern aunt; her topics mostly revolved around budgets, mission reports, and maintenance costs—not exactly thrilling.

Ren stretched, cracked his neck, and sighed. "Guess I'll go explore another world for a bit."

Heading back to his room, he summoned the Star Gate, a dimensional artifact that allowed him to traverse alternate worlds.

He stepped through, arriving in the Noragami world first.

Activating his Witch's Eye—a perception technique that allowed him to see the spiritual composition of souls—he scanned for any lost spirits that could be purified or contracted as divine weapons.

No luck.

Ren closed his eye with a sigh. "This world's pretty quiet today."

Summoning the Star Gate once more, he left, this time redirecting himself to the Type-Moon world.

But instead of touching down in Japan, he found himself aboard an airplane mid-flight—its destination: New York.

And the situation was dire.

The cabin was infested with Dead Apostle Bees, their parasitic venom having transformed the passengers into mindless Ghouls. Blood painted the seats. The groans of the undead filled the air.

Ren blinked. "Wait… this is that flight. The one Kiritsugu blew up."

He recalled the moment from the original timeline. Natalia Kaminski, a freelancer in the supernatural underworld and Kiritsugu's adoptive mother, had been on this mission to eliminate Odd Borzak, the mage responsible for weaponizing the Dead Apostle Bees. She succeeded, but not before the creatures turned the plane into a flying coffin.

(See Attached)

Unable to land safely—and unwilling to risk the outbreak—Kiritsugu had made the cold, calculated decision to destroy the plane himself. He sacrificed Natalia for the greater good.

But not this time.

"If I'm here… I might as well change her fate."

Ren raised a hand. "Domain Expansion: Infinite Void."

In an instant, his domain bloomed outward, engulfing the entire aircraft in an infinite space of information overload. The Ghouls froze mid-lurch, paralyzed by an endless stream of meaningless knowledge. The Dead Apostle Bees dropped like flies, their tiny minds shredded.

One move. Total annihilation.

Ren dismissed the domain and walked casually toward the cockpit. He knocked on the reinforced door. "Hey. The bounty hunter inside. It's safe now. You can come out."

Inside the cockpit, Natalia's eyes widened. Someone… alive? And claiming the nightmare in the cabin was over?

She hesitated. This had to be a trick, right? Emiya Kiritsugu had already made his decision—he was likely preparing to fire a missile as they spoke. Still, if she was going to die anyway, she might as well confirm it with her own eyes.

Slowly, she opened the cockpit door—and gasped.

The cabin was littered with corpses. Not a single Ghoul moved. Not a buzz from the cursed bees. And in the middle of it all stood a young man whose presence seemed to bend the air itself—handsome, composed, and radiating an aura of calm power.

"You did all this?" she asked, eyes narrowing.

"You could say that," Ren replied with a casual shrug. "Consider your life saved. You owe me one."

Natalia's face hardened. "What do you want in return?"

"Simple," Ren said with a grin. "Follow me for ten years."

She didn't hesitate. "Deal."

A decade wasn't long. She'd had worse contracts. But just then, Ren's expression shifted slightly.

Akiyama Ren felt the incoming missile a moment before its signal pierced the sky. His lips curled into a teasing smirk.

"Looks like the contract just doubled. Twenty years now," he said lightly, glancing at Natalia.

Natalia blinked in confusion—until she caught the flash of something deadly hurtling toward the aircraft from the clouds outside.

Through the cabin window, she saw it: a guided missile, aimed precisely at them.

"Emiya Kiritsugu, you really are something…" she muttered bitterly, a wry smile tugging at her lips. Even after being saved, fate seemed determined to drag her back to death.

But before the missile could strike, Ren stepped forward, wrapped an arm around her waist, and with a quiet pulse of cursed energy, teleported them both from the aircraft.

They vanished just as the plane exploded behind them in a brilliant flare of fire and wreckage, lighting up the night sky like a dying star.

Natalia gasped as she found herself suspended high above the clouds, the wind rushing past them, yet her body felt no pressure or cold. They were standing—no, floating—in a Hollow Space, a reality bubble carved between dimensions by Ren's refined technique: a hybrid of jujutsu-based Barrier Space Manipulation and Type-Moon-style High-Speed Divine Evocation.

"Was that… Flying Magic?" she whispered in awe, staring at the young man who had so effortlessly saved her life not once, but twice.

Ren gave her a sideways glance. "Technically, more like a dimensional phase shift. But yeah, close enough."

"You really are something else," Natalia murmured.

Ren turned toward her with a grin. "Twice now I've pulled you from the brink. That's twenty years you owe me."

Natalia exhaled, defeated but not ungrateful. "Twenty years it is. You've got yourself a deal."

She wasn't about to argue with a sorcerer who could manipulate space like this. And frankly, she'd prefer twenty years of debt over a midair burial.

Ren nodded approvingly. "Glad you're reasonable."

With a flick of his wrist, the Hollow collapsed, and the two reappeared within a grand, ancient stone castle. Gothic arches, iron candelabras, and the faint hum of magecraft filled the air.

Natalia glanced around warily. "Where… are we now?"

"Germany. The Einzbern Castle—their headquarters," Ren replied calmly.

"What?" Natalia's voice tightened with alarm. "You brought us into the heart of the Einzbern family? Are you insane? We're trespassing in one of the most dangerous magical strongholds in Europe!"

Her eyes narrowed. "And what even is that teleportation technique? Is that some form of Sorcery? High Thaumaturgy?"

"Relax," Ren said with a wave of his hand. "I've got it under control."

Before Natalia could press him further, Ren raised both palms and began weaving a Barrier Formation into the air, drawing from Onmyoji-style purification rites merged with Western structural sorcery. A wave of darkened energy swept down like a curtain, forming an enormous dome-like construct over the entire castle grounds.

"Black mist that clings to the soul, begone," he intoned. "Impurity and sin—expelled."

The air crackled as the barrier took form—a Dark Cleansing Seal, a fusion of Jujutsu and Magic-based containment.

Natalia's eyes widened as it dropped over the estate like a descending shroud.

From within the castle, several uniformed maids—homunculi created by the Einzberns—rushed to respond to the intrusion, weapons drawn and thaumaturgic arrays glowing in their eyes.

"They're coming," Natalia warned.

Ren didn't even blink. He clapped his hands once—Genjutsu Weaving: Dreamlight Mirage.

A burst of illusion-based cursed energy swept outward, wrapping around every sentient being within the barrier. One by one, the maids collapsed, overwhelmed by induced sleep spells and fragmented dream states.

The castle fell into stillness.

Natalia stared at him, stunned. "You put the whole castle to sleep in seconds."

Ren smirked. "I said I had it under control, didn't I?"

*********

Before anyone can bash my head, tell me where I messed up the jargon, if I messed up.

I didn't like jjk or Fate.