Reincarnated in DxD With the 100X System

The night air was cool and quiet, the chaos of my battle already fading into the background.

The only real proof that tonight had been anything but normal?

The scorched pavement I left behind.

The newly awakened god-tier Sacred Gear thrumming in my veins.

And, of course… the stack of advanced math books in my arms.

I sighed.

"Defeated a Fallen Angel, awakened my god-tier Sacred Gear, and still ended the night carrying math textbooks. Anime protagonists have it rough."

This was the true power balance of the universe.

One second, I was forging weapons that could shake the supernatural world—

The next?

I was carrying Calculus IV like some overachieving nerd.

Truly, fate was cruel.

But then—

I noticed something.

A presence.

Not hostile.

Not exactly subtle, either.

But definitely following me.

I didn't even need to look.

I could already tell who it was.

Mittelt.

She was a few paces behind me, clearly trying to act casual—like she hadn't just gotten her entire worldview shattered.

Her wings were gone, hidden away, but her expression?

That was pure, unfiltered confusion.

Embarrassed? Definitely.

Fascinated? Without a doubt.

I smirked to myself.

"Is she seriously following me home? Did I hit her too hard and unlock a hidden masochist route?"

Mittelt had to be losing her mind right now.

A few hours ago?

She thought I was just some weak human.

She thought she could kill me and move on with her night.

Now?

She was following the same human who wiped the floor with her and casually offered her a maid position.

This was definitely not how she expected her night to go.

I kept walking, pretending not to notice her, waiting to see how long she'd keep this up.

Would she keep trailing behind me awkwardly?

Or…

Would she finally admit that she had no idea what to do next?

Either way—

This was going to be fun. 

——————————

The quiet streets of Kuoh stretched ahead, bathed in the soft glow of streetlights.

I had ignored it for long enough.

Finally, I turned around.

And caught Mittelt openly staring at my face.

Not subtly.

Not discreetly.

Just full-on, wide-eyed, intensely staring.

I raised a brow.

"Are you falling for me or planning revenge? Because I'm getting mixed signals."

Mittelt blushed furiously, her entire demeanor shifting from conflicted Fallen Angel to flustered tsundere.

Her wings twitched involuntarily, and she crossed her arms like that would somehow make this moment less awkward.

"Sh-Shut up! I'm just making sure you don't try anything suspicious!"

Uh-huh.

Because, clearly, I was the suspicious one here.

I smirked, tilting my head.

"You're the supernatural stalker here, remember?"

Mittelt froze.

She opened her mouth—then shut it again.

Then opened it one more time, struggling to come up with literally any excuse.

Her face just got redder.

I could practically see the error message flashing in her brain.

Internally, I couldn't help but reflect:

Defeated a Fallen Angel? Check.

Recruited said Fallen Angel? Check.

Now dealing with a tsundere who doesn't know why she's still following me?

Achievement unlocked: Successfully Adopted a Gothic Lolita Fallen Angel.

I shook my head, turning back toward my path home.

If she was too stubborn to admit her curiosity, then I wasn't about to force it.

Besides—

This was already entertaining enough.

And something told me…

This was just the beginning.

—————————

The walk back home was quiet—aside from the occasional awkward glance from my newly acquired Fallen Angel.

By the time we arrived, I was relieved to find the house empty.

A single note was left on the kitchen counter, confirming what I already expected.

🔹 "We'll be away for another business trip. Call if you need anything. – Mom & Dad."

Perfect.

I tossed my math books onto the couch, stretching lazily.

"Thank god my parents never ask questions—I'm not sure how I'd explain bringing a blonde loli home at night."

I could already picture the conversation.

Mom: "Oh honey, who's your cute little friend?"

Me: "Oh, just a former Fallen Angel assassin I beat into submission. Can she stay?"

Mom: "That's nice. Want me to make extra dinner?"

Yeah. Not happening.

Behind me, Mittelt looked around cautiously, her wings twitching slightly as she stepped inside.

She had the tense posture of someone walking into enemy territory.

Her golden eyes flicked toward me, her expression half-curious, half-defensive.

"Are your parents around?" she asked, her voice a mix of suspicion and caution.

I turned to her with a slow smirk, leaning casually against the doorframe.

"Relax. It's just us."

Then, I let my voice drop just enough to make it sound way more ominous than necessary.

"No one to save you if I decide to punish a naughty Fallen Angel."

Mittelt froze.

Her entire face turned red.

Her wings twitched aggressively, and she instinctively took a step back— only to hit the wall behind her.

Visibly nervous.

Yet… intrigued.

Her lips parted as if she wanted to snap back at me—

But nothing came out.

I chuckled, walking past her toward the kitchen like nothing happened.

"Make yourself comfortable, Mittelt. You're home now."

Her wings ruffled again, but she didn't argue.

Instead, she just grumbled something under her breath and followed, still flustered. 

With the house finally quiet, I decided it was time to test out my newly awakened Sacred Gear.

🔹 [Divine Forge – Aetherius]

The moment I activated it, raw creation energy surged through me, the circuits along my arms glowing brighter as if excited to be used.

This wasn't just magic.

This was pure craftsmanship on a divine scale.

I closed my eyes, focusing.

Time to forge something.

Aetherius pulsed.

In mere seconds, I had shaped raw energy into woven fabric, delicate lace, and high-quality embroidery.

Every thread, every detail—crafted to absolute perfection.

The final result?

An intricate, high-quality French maid outfit.

I stared at my masterpiece, holding it up in front of me.

For a long moment, I just… admired it.

Then I blinked.

"Wait… my first official creation was a cosplay outfit?"

I exhaled, shaking my head.

"Damn, my priorities are something else."

Behind me, Mittelt had been watching the entire process unfold.

I turned toward her, proudly presenting my divinely-crafted maid uniform.

She stared.

Then, her entire face turned red.

Her mouth opened.

Then closed.

Then opened again.

Her wings twitched violently.

Her eyes were wide with a mix of horror, embarrassment, and disbelief.

The room temperature seemed to rise from sheer tsundere energy.

Then she finally exploded.

"Y-YOU… YOU EXPECT ME TO WEAR THAT?!"

I smirked, holding the outfit out toward her.

"Of course. It's custom-made—only the best for my first official maid."

Her wings flared aggressively.

She looked like she was one second away from trying to kill me again.

But we both knew she wouldn't.

I just chuckled, tossing the outfit onto the couch.

"Go on, try it on. I need to see if the Divine Forge sizing function is as good as I think it is."

Mittelt gritted her teeth, trembling.

But in the end…

She didn't refuse outright.

She didn't storm out.

She just stood there, glaring at me with a face still burning red.

Which meant…

She was considering it.