Well here's an idea with a "Day of the Rape", but really it's more on a Culture Shock and Integration to Society thing.
>Starts with the DL figuring out that there is another world in a different dimension
>She is the Chief God now, the world is hers and peace and love reign supreme at the very laws of nature themselves
>With great power she can gaze into existence itself and ponder, and in doing so found another existence
>What does she hear upon her existence emerging within this new cosmos
>The roar of fire, the flurry of cold wind, the smell of pungent sulfur, smoke ascending from metal cylinders
>Humans! Encapsulated in the metal cylinders, riding a fire into the sky at great speeds even the magics struggle to compete with
>Below a small crowd of humans looked onward, they were curious and awed, happy.
>There was a familiarity in their hearts, a solidarity, these humans in their metal cylinders were their fellow people
>What a curious display, she would love to see more of this world and all its wonder-
>Death. Explosion. The fire coming to consume the metal cylinder, she felt the icy nails slice into her heart as the humans inside, seven of them, were heard from nevermore
>Her gaze returns back to the humans below. Shock. Confusion. Sadness and shame.
>They called the metal box the 'Challenger', its engineering was flawed, and they would investigate what had happened
>They mourned, they criticized each other, and then they looked up and said, "As they pass from us to glory, we will never forget them."
>So the Demon Lord went over the Earth, and found great strife and triumph, anger and togetherness, a world cold like her own was before she would change it.
>And so a little time passed, and at the end of the year one faction of nations began to train. To practice a fake war to prepare for a real one.
>To her dread, she saw the other faction mistake this "Able Archer '83" as they called it for a real attack, they prepared weapons
>Big weapons, she felt their potential, she saw great cities fall to great heat and force, she'd never felt something like it aside from the gods
>Thousands of them
>They were ready to fire them
>The other side would retaliate with the same, the world would be consumed in fire
>She panicked, she had never felt so mortal before
>A man, a soldier, looks at some sort of mirror, it gives him false data
>She must appear, she must act, with her own power, she feeds it through the dimension
>Requiring great amounts of energy to transform it to this dimensions laws, it seeps to the mans mirror and shuts down its thunder
>The man becomes alarmed at the sudden darkness of his powerless mirror, a conviction reaches him
>He stands up and runs to a device, the DL believe Gremlins called it a 'phone', he turns a crank desperately and speaks into the phone in his language
>The information is passed to a place many miles away, a group of men with much power convene over a map, they are paranoid
>They order an attack with their bright sun-like weapons
>No. No they can't. Had the she caused this herself?
>She couldn't let this happen, she cannot, how many men would die?
>She fought a war to end this, she'd not see it happen ever again.
>So be it if she had to come to this world too, even if it mean't sacrificing great amounts of power
>Expend all the energy she had built up for countless millennia, she flooded this new dimension and ordered its physics to her command if only for a second
>Its all she could hope to do
>The firey metal darts careened into the sky
>The other faction, with their mirrors, seemed to have spotted these missiles, they panicked and fired their own
>But a moment, but an instant, the darts would land
>Nothing would happen
>Their arrow-heads never unleashed their power, for the Demon Lord had changed the very laws of physics themselves
>It was an interesting couple of hours as the US Armed Forces and BCCCP both gazed incredulously at their monitors, impact had occurred, yet everything was intact
>Could it even be possible that all warheads had failed to detonate? On both sides?
>Clearly something must have happened, because reports of nuclear power plants across each of the countries have announced they all have had a complete shut down and loss of reaction
>An utterly flabbergasted Colonel raises his arms as he gazes at the Master Monitor under Cheyenne Mountain. "What the fuck just happened?"
>The Demon Lord had done it, utilized all her energy to bind their dimensions together, only to save them
>Her husband would lecture her on this, but the deed was done
>She knew they would try to follow up with other means of war, she'd need to figure out something
>She realized that this dimensions properties worked different than her own
>Magic, and the Energies, are much weaker in this world, and because of these physical elements restricted, Mamono would be weaker as well