The silver-haired man lay sprawled on the ground—
My iron fist had obliterated his armor completely. Blood stread from his body; he showed no signs of rising.
He seed unconscious.
The area around Eugrit was a massive crater from the shockwave of my punch—the terrain utterly transford.
'That felt good.'
Ddraig had been pissed beyond belief.
For now, I'd beaten the crap out of him. Mission accomplished.
The Sekiryuutei is us... right, partner?
'Yeah. We're the only ones in the world who can claim that title.'
Ddraig's voice carried a hint of joy.
"Issei-kun..."
Rossweisse-san approached.
The magical ropes Eugrit had bound her with were gone—Rias must have undone them.
I released my armor and smiled.
"It's over, Rossweisse... Let's go ho—to our friends."
"...! Yes!"
Her face looked as if a weight had lifted.
Whoa—my legs wobbled.
Rias caught as I staggered.
"You okay, Issei?"
"Ahaha... Using the secret art might've pushed too far..."
It forces ki beyond limits into the body; the aftermath always hits hard. I'd need rest.
"You exerted that much impossible power. It can't be helped. Rossweisse, can you take his right side?"
"Y-Yes!"
At Rias's request, Rossweisse-san moved to support my shoulder.
That's when it happened—
"Yeah, yeah. As expected of the hero. Took him down in a flash."
A third voice echoed across the field!
I whipped around—there stood the white-haired boy, Asem!
Sweat poured down my back as I glared.
"You pick now to show up...?!"
Wasn't he with Rizevim!?
No—the timing was the real killer!
I'd burned through my power; I had nothing left to fight him. Rias and Rossweisse-san wouldn't stand a chance.
As I braced myself in panic, Asem grinned.
"Don't worry, don't worry. It's too early for to fight directly."
"...Then why are you here?"
"Hmm... Call it a little... extra stage?"
As he spoke, multiple magic circles unfolded in the sky—summoning arrays.
They flared, and sothing erged.
We were speechless.
"No way... They've mass-produced this many already...?!"
Rias's eyes widened.
Before us: twenty sets of Sekiryuutei armor.
They'd duplicated this many already!
Asem chuckled.
"This is the final battle. Can you overco it? Good luck~"
With that, he vanished in a transfer circle.
Damn it...!
I was exhausted from the secret art!
Rossweisse-san stepped forward.
"I'll stay! Rias-san, take Issei-kun!"
"What are you saying!? Even if they're copies, each one has Issei's power! We need to—"
One of the duplicates launched an attack mid-sentence!
A crimson demonic bullet hurtled toward us!
Rossweisse-san deployed a defense circle instantly, but it wouldn't hold!
I whipped my screaming body into action, grabbing them both and leaping back!
We barely dodged, but—
"Guh...!"
Agony shot through .
The secret art's toll was brutal...!
"Issei!"
Voices from behind.
Alice, Miu, and Ravel flew in, landing and rushing over.
"Alice, the other side?"
"It's under control. The evil dragon was almost done, so we ca... perfect timing."
Alice's expression darkened at the twenty armored duplicates floating above.
We'd anticipated this, but seeing mass production this soon...
Twenty copies of in armor.
That ant twenty Maou-class threats.
Sweat trickled down Miu's cheek.
"This is impossible...! With just us here...!"
I was spent. The others were worn out. Even if the school group arrived, turning this around seed hopeless...
The Underworld forces wouldn't reach us in ti.
What now...?
Everyone scrambled for a way out.
Then—
'Master! Master!'
Huh?
A past female Sekiryuutei spoke up?
What is it?
We're in deep shit here...
Now the male ones chid in.
'It's fine! This is when you show your true potential!'
Elsha-san and Belzard-san followed.
'The source of your evolution has always been right there.'
'You've escaped crises with it before. Isn't this the sa?'
Wait... don't tell —
'''Yes! Now's the ti to touch boobs! Evolve further with Breast Power!!'''
HOLD UP!!
Even I have to ask—are you sane!?
Sure, poking Alice's boobs got to Juggernaut Drive!
Poking Alice and Rias's unlocked new possibilities!
But Breast Power!? First I've heard of it!
I couldn't stop retorting. Rias noticed my confusion.
"Issei? What's wrong?"
"...Hear out calmly?"
"Of course. We need to stay level-headed in a crisis."
"...The past seniors say... borrow the power of boobs."
"..."
Rias froze!
Of course!
Alice grabbed my collar!
"Boobs again!? You're making the sa mistake!?"
"Wait! It wasn't ! I didn't say it—don't hit eeeee!"
One Alice punch in this state and I'm dead!
Tears welled up, but the seniors pressed on.
'This is the perfect chance!'
'Two Switch Princesses are here! Double Switch Princesses!'
'Nothing could be more reassuring!'
Why the enthusiasm!?
Ignis suddenly realized sothing.
'...You an that? It's still theoretical. Success isn't guaranteed...'
'No, Goddess! They can do it! If we believe in them, they'll succeed!'
Sorry, I'm lost...
What exactly do you want to do?
It's not just "poke like usual," right?
'Exactly... Alice-chan and Rias-chan—Double Switch Princesses who crossed dinsions. And the Boob Dragon Issei, who turns impossible into possible...'
Ignis's voice was dead serious.
That made it scarier—like she was plotting sothing insane...
She materialized beside , scanning , Alice, then Rias.
"All three of you, listen. Only your cooperation can change this. Hear out."
She paused, then stared straight.
"Issei, suck both their boobs. At the sa ti."
"..."
"..."
"..."
Our brains shut down.
A few seconds later—
"""WHAAAAAAT!? HERE!? AND SUCK!?"""
Our voices overlapped!
Obviously!
Telling us to suck here and now—and both at once!?
I blurted my question.
"Why suck!? And both at once—what!?"
"My theory—T·O·S: Twin·Oppai·System. Synchronize the Switch Princesses' Breast Power—not double it, but square it. Output incomparable to past Breast Power. Still theoretical, but my calculations confirm it."
"How can you say that nonsense so seriously!? Synchronize Breast Power—what!? You calculated it!? What's in your head!?"
"Drink both their milk at once. Swirl it properly with your tongue."
Too vivid!
-------------------------------
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