Open Up--!! Demon King--!!! (1)
Human history has been stained by countless wars.
Yet never in any age had the world held its breath before a single being.
Not until she appeared.
The Demon King, Firva Chera Igortra.
The absolute sovereign hailed as the strongest in all of demon history — the first monarch to unify the Demon Realm across hundreds of years.
She single-handedly crushed dozens of Demon King candidates and, through sheer power alone, forced into submission a demon race that had been too busy slaughtering one another to do anything else.
After her ascension, the Demon Realm became a single kingdom for the first time, and from that day forward every demon began to revere only one name.
Wherever Firva passed, no life remained on the battlefield.
Dragons abandoned the skies. Giants fled deep into the mountain ranges. Human empires tore down their own borders and raised white flags of surrender.
Weapons once called holy swords shattered to pieces at her fingertips, and those once called heroes vanished from history without even leaving their names behind.
People did not call her a "catastrophe."
Catastrophes eventually end — but Firva was a terror without end.
Her name became a spell that stopped children from crying, and kings checked her mood before they checked their diplomacy.
An entire continent went to war at a single word from her, and maintained peace at her mere silence.
And everyone believed.
That the Demon King Firva Chera Igortra was a being who would never fall.
Until that day came…
"And so — open up--!! Demon King--!!!"
"Aaaaaaaaah--!! Can you not at least preserve my dignity in the prologue--!!"
The Demon King… Firva recoiled in horror and screamed at the woman advancing on her.
"Introducing the Ice Sea Cucumber~! Stick it in a pussy and it contracts and expands over and over, apparently~! I've been dying to try it out!!"
"Why..!! Why am I always the first one--!!"
"Clinical trials are over, so rest easy~!"
"…… Is that true?"
"Nope. Total lie."
"Kyaaaaaaaaaaaaaaah--!!"
The day she was defeated by the Hero summoned from another world —
she fell.
Fell into becoming the beta tester for every adult toy the Hero brought her way.