A New Nightmare
Sliverhero
I trust you know where the happy button is?
- Joined
- Jun 11, 2025
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So I watched the chainsawman movie, it was epic.
So it gave me an idea for a crossover where a isekai devil at the end of the movie on the beach scene, decides to interfere and send the the three to rwby where denji and reze ends up becoming jaune parents.
If anyone wants to continue it or make there own version they are free do so.
So here is the prologue.
The waves rolled in soft and red beneath the fading sun. Denji stood knee-deep in the surf, chest heaving, blood dripping from the dull tips of his chainsaws. The roar of battle was gone now — only the hiss of the tide and the quiet wheeze of his breath remained. Reze lay a few feet away, face half-buried in the sand. The wind tugged at her wet hair.
"Hey," Denji muttered, stumbling toward her. His voice cracked. "You're still breathing, right?"
Her eyelids fluttered. For a moment, he saw that same look — half a smile, half an apology — before she exhaled and tried to sit up.
He dropped beside her with a tired grin. "Told ya I'd save you." "Idiot," she murmured, though there was no venom in her voice. Just exhaustion. And something that almost sounded like relief.
For a fleeting second, Denji thought maybe this was it , maybe the two of them could actually walk away from all of it,from Makima, from Devils. From hell itself. Then the air split open.
A sound like glass shattering and thunder crashing at once tore through the beach. The horizon folded inward, black and gold and endless. Out of it stepped something wrong — a figure that seemed to change shape every time Denji blinked. Its face was made of hundreds of other faces, whispering all at once.
Beam burst from the waves, tail thrashing. "Lord Chainsaw Man! That's no ordinary devil! That's..." The creature tilted its head. "...the Isekai Devil," it finished for him, voice echoing in a thousand tones. "Born from the fear of being taken somewhere you don't belong."
Denji raised his chainsaws again, but his hands trembled. "You talk too much, freak." The Isekai Devil's smile spread across every face on its body. "And you were supposed to die under her thumb. How disappointing for Makima."
Reze's eyes widened. "Makima…?" "She had plans for you all," the Devil murmured. "But I like rewriting plans." Before anyone could move, its hand opened — and the world bent. Wind howled as a vortex of color and void erupted, dragging everything toward it. Sand, water, even the sunset spiraled inward.
"Denji!" Reze screamed, reaching for him.
He grabbed her arm, chains whirring as he tried to anchor them into the ground. Beam lunged forward, fangs out. "LONG LIVE..." The rest was torn away.
They hit the ground hard. Denji groaned, rolling over on cool grass that shouldn't have existed. The air smelled clean. Wrongly clean. No smog, no city rot, just wind and dirt and something sweet.
Reze stirred beside him, blinking at the shattered sky above. "Denji… where are we?"
"No clue," he muttered. "But… that moon looks busted." Beam landed headfirst in a nearby stream, tail fin twitching. "My lord… I believe we have been relocated!"
Denji squinted up at the moon again — cracked like glass, half a planet missing. "Yeah, no kidding." QA growl broke the silence. They turned.
A creature stood at the edge of the woods, something black and hulking, eyes glowing red, bones like armor. It stepped forward on clawed feet, the ground cracking beneath it.
Denji sighed. "Tch. Another devil?"The thing snarled, then froze. Its gaze met Denji's. Something primal flashed in its eyes, and it backed away. Whining. Terrified. Reze frowned. "It's… scared?" "Yeah," Denji said, flexing his fingers. "Guess even monsters got good instincts."
They walked until their legs gave out, until the trees parted and a small farmhouse appeared ahead, lantern light spilling through the windows. An older man stepped outside, grey-haired and gentle-eyed, with a woman right behind him holding a blanket.
"Good gods," the man breathed. "You three look like you've been through hell." Denji laughed weakly. "Something like that."
"Come in, come in!" the woman said, ushering them toward the door. "We'll get you cleaned up." Denji hesitated, glancing back at Reze. She gave a tiny nod. They followed.
Inside, warmth replaced the cold. The man smiled kindly. "Name's Giles Arc," he said. "You're safe here." For the first time in a long time, Denji believed it.
Meanwhile… Tokyo.
The Control Devil stood in silence, the city lights painting her in gold and shadow. Makima's eyes were closed. She could feel it, faint, distant, flickering like a dying signal. A trace of Beam's madness. And somewhere beyond that, him.
"You made a mistake," she whispered to the void. "You took what's mine."
A ripple of pressure swept through the room as the air grew thin. Her smile was soft. Beautiful. Terrifying. "If the Isekai Devil thinks it can steal from me… "Her eyes opened. Rings of amber glowed. "…then I'll simply have to follow."
Outside, somewhere unseen, the rift between worlds pulsed again — and from its cracks, other devils began to crawl. Drawn by something new. Something hungry.
In this new world, where Grimm roamed and Hunters fought with light, a new kind of nightmare had just arrived.
So it gave me an idea for a crossover where a isekai devil at the end of the movie on the beach scene, decides to interfere and send the the three to rwby where denji and reze ends up becoming jaune parents.
If anyone wants to continue it or make there own version they are free do so.
So here is the prologue.
The waves rolled in soft and red beneath the fading sun. Denji stood knee-deep in the surf, chest heaving, blood dripping from the dull tips of his chainsaws. The roar of battle was gone now — only the hiss of the tide and the quiet wheeze of his breath remained. Reze lay a few feet away, face half-buried in the sand. The wind tugged at her wet hair.
"Hey," Denji muttered, stumbling toward her. His voice cracked. "You're still breathing, right?"
Her eyelids fluttered. For a moment, he saw that same look — half a smile, half an apology — before she exhaled and tried to sit up.
He dropped beside her with a tired grin. "Told ya I'd save you." "Idiot," she murmured, though there was no venom in her voice. Just exhaustion. And something that almost sounded like relief.
For a fleeting second, Denji thought maybe this was it , maybe the two of them could actually walk away from all of it,from Makima, from Devils. From hell itself. Then the air split open.
A sound like glass shattering and thunder crashing at once tore through the beach. The horizon folded inward, black and gold and endless. Out of it stepped something wrong — a figure that seemed to change shape every time Denji blinked. Its face was made of hundreds of other faces, whispering all at once.
Beam burst from the waves, tail thrashing. "Lord Chainsaw Man! That's no ordinary devil! That's..." The creature tilted its head. "...the Isekai Devil," it finished for him, voice echoing in a thousand tones. "Born from the fear of being taken somewhere you don't belong."
Denji raised his chainsaws again, but his hands trembled. "You talk too much, freak." The Isekai Devil's smile spread across every face on its body. "And you were supposed to die under her thumb. How disappointing for Makima."
Reze's eyes widened. "Makima…?" "She had plans for you all," the Devil murmured. "But I like rewriting plans." Before anyone could move, its hand opened — and the world bent. Wind howled as a vortex of color and void erupted, dragging everything toward it. Sand, water, even the sunset spiraled inward.
"Denji!" Reze screamed, reaching for him.
He grabbed her arm, chains whirring as he tried to anchor them into the ground. Beam lunged forward, fangs out. "LONG LIVE..." The rest was torn away.
They hit the ground hard. Denji groaned, rolling over on cool grass that shouldn't have existed. The air smelled clean. Wrongly clean. No smog, no city rot, just wind and dirt and something sweet.
Reze stirred beside him, blinking at the shattered sky above. "Denji… where are we?"
"No clue," he muttered. "But… that moon looks busted." Beam landed headfirst in a nearby stream, tail fin twitching. "My lord… I believe we have been relocated!"
Denji squinted up at the moon again — cracked like glass, half a planet missing. "Yeah, no kidding." QA growl broke the silence. They turned.
A creature stood at the edge of the woods, something black and hulking, eyes glowing red, bones like armor. It stepped forward on clawed feet, the ground cracking beneath it.
Denji sighed. "Tch. Another devil?"The thing snarled, then froze. Its gaze met Denji's. Something primal flashed in its eyes, and it backed away. Whining. Terrified. Reze frowned. "It's… scared?" "Yeah," Denji said, flexing his fingers. "Guess even monsters got good instincts."
They walked until their legs gave out, until the trees parted and a small farmhouse appeared ahead, lantern light spilling through the windows. An older man stepped outside, grey-haired and gentle-eyed, with a woman right behind him holding a blanket.
"Good gods," the man breathed. "You three look like you've been through hell." Denji laughed weakly. "Something like that."
"Come in, come in!" the woman said, ushering them toward the door. "We'll get you cleaned up." Denji hesitated, glancing back at Reze. She gave a tiny nod. They followed.
Inside, warmth replaced the cold. The man smiled kindly. "Name's Giles Arc," he said. "You're safe here." For the first time in a long time, Denji believed it.
Meanwhile… Tokyo.
The Control Devil stood in silence, the city lights painting her in gold and shadow. Makima's eyes were closed. She could feel it, faint, distant, flickering like a dying signal. A trace of Beam's madness. And somewhere beyond that, him.
"You made a mistake," she whispered to the void. "You took what's mine."
A ripple of pressure swept through the room as the air grew thin. Her smile was soft. Beautiful. Terrifying. "If the Isekai Devil thinks it can steal from me… "Her eyes opened. Rings of amber glowed. "…then I'll simply have to follow."
Outside, somewhere unseen, the rift between worlds pulsed again — and from its cracks, other devils began to crawl. Drawn by something new. Something hungry.
In this new world, where Grimm roamed and Hunters fought with light, a new kind of nightmare had just arrived.
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