Reincarnated in DxD With the 100X System

A sharp crack echoed through the empty park as Mittelt lunged, her light spear humming with deadly energy.

She wasn't holding back.

The first strike came—too fast.

Too fast for a normal human.

Too fast for me.

Move!

My instincts screamed, but my body lagged by a fraction of a second.

I twisted—not fast enough.

Ssshhk!

A searing heat slashed across my shoulder, cutting through my jacket. The smell of burned fabric and skin filled my nose.

I blinked.

Then I slowly looked down at my shoulder.

...My jacket.

My. Favorite. Jacket.

"…Oh, hell no."

Mittelt grinned, twirling her spear with a mocking laugh.

"What's wrong? Thought you were fast?"

I staggered back, chest heaving, my pulse pounding like a war drum.

This was different.

Training in a controlled environment? Easy.

Dodging theoretical attacks? Fun.

But this?

This was real.

The weight of a true opponent.

The pressure of lethal intent.

The realization that one wrong move = death.

"Oh yeah, this is what anime protagonists go through. No wonder they scream all the time."

Mittelt's grin widened, golden eyes gleaming with amusement.

"You look like you just realized you're a side character."

I snorted through the pain.

"Nah. Just realized I should've packed a healing potion."

She lunged again—faster, sharper, more relentless.

I barely dodged the first strike, stumbling as the light spear whistled past my ribs.

The second? I blocked clumsily, my arm jarring from the impact.

The third?

I couldn't dodge in time.

Thwack!

A solid kick slammed into my ribs, forcing the air from my lungs.

I reeled backward, gasping, vision blurring for a split second.

Pain flared—sharp, raw, real.

She's stronger than I thought.

Her movements were refined. Fast, efficient, trained.

Mine?

Sloppy. Desperate. Too slow.

She feinted left—my guard snapped up.

A trick.

Her spear lashed from the right instead, and I twisted too late—the tip scraped my ribs.

I gritted my teeth, staggering back.

I was losing.

Then—

[DING!] – 100X SYSTEM ACTIVATED

And suddenly—

Everything shifted.

The world slowed.

Numbers, calculations, probabilities—they flooded my brain in an instant.

My breath steadied.

Pain? Still there. But distant.

Fear? Gone.

I felt lighter. Faster. Stronger.

Mittelt lunged again—

And I saw everything.

🔹 The way her weight shifted slightly before a feint.

🔹 The tightening of her grip before a real attack.

🔹 The slight twitch in her leg before a kick.

Predictable. Readable. Too slow.

She thrust forward, her spear cutting through the air like a lightning strike.

But this time—

I was already moving.

A twist to the left—just enough to let the spear graze past harmlessly.

Her brows furrowed.

She adjusted, swinging the spear in a tight arc.

I stepped forward instead of back.

Her eyes widened—too late.

I caught her wrist, twisting it slightly—not enough to break, just enough to disrupt her motion.

Her spear's momentum shifted—the light weapon jerked to the side instead of hitting me.

She stumbled.

That wasn't luck.

Her wings flared, and she went for a roundhouse kick.

I saw it coming before she even finished turning.

Step forward.

Catch her leg mid-swing.

Hold.

The moment froze.

Her smug grin disappeared.

I grinned down at her.

"Not so cocky now, huh?"

Mittelt screeched, yanking her leg free before jumping back, her wings beating hard against the night air.

She glared at me, her expression twisting into frustration.

"This… this wasn't supposed to happen."

I was supposed to be struggling.

I was supposed to be an easy target.

I was supposed to be afraid.

Instead, I was getting better. Mid-fight.

She snarled.

"Stop smiling and fight seriously!"

I cracked my knuckles.

"Oh, I am. This is just my default face."

Her golden eyes twitched.

She let out an animalistic growl, gripping her spear tighter.

"Annoying bastard."

I tilted my head.

"I mean, yeah. But let's focus on how you haven't hit me in the last ten seconds."

Twitch.

Oh, she's pissed. Nice.

I took a step forward, my body relaxed, movements smooth.

"Alright, cosplay angel."

I rolled my shoulders.

"You asked for it."

Her wings flared—she was about to charge again.

But before she moved, I casually added—

"By the way, that outfit's cute. You go to Akihabara often?"

Mittelt froze.

Her spear jerked mid-air.

For a solid two seconds, she just stared at me.

Then—

"W-WHAT?! WHO THE HELL GOES TO AKIHABARA?! YOU—YOU DAMN HUMAN!"

She lunged, face red with rage.

I laughed.

"Oh, this is gonna be fun."

The warm-up was over.

Now, it was my turn.