(A/N: This is set between episode 23 and 24 of Diamond is Unbreakable and in the climax of episode 11 of Volume 3.)

Story Arc I :Jotaro's Mind Had Warped! (P1)

Synopsis:

What if during the period that Jotaro was knocked out by Sheer Heart Attack, his mind went towards somewhere else that really needs help? And what if in his universe time is not moving until he's done everything about the unearthly world he's in right now?

"Yare yare daze."

The lone man, once a delinquent, now a marine biologist by the name of Jotaro Kujo, walked through the dark place, looking everywhere while also thinking,

"How on Earth did I even get into this place?"

He looked at his hands, and then at his body, examining for anything that could indicate he was already wounded. When he found none, he got a little confused.

"I'm not even scratched. That little tank had done a number on me, yet here I am, standing undamaged, in a mysterious place I had never seen or even heard of. Just what actually had happened?"

He then thought back to his fight with the little tank, Sheer Heart Attack. The name was not known to him as of this point, so he just called referred to it as a tank Stand.

"I created the fire to distract that tank Stand from attacking Koichi and I took the damage. I only had been knocked out cold. I'm not dead yet."

He continued walking while trying to find any signs of civilization, not knowing a disaster had befell upon the place.

"This is getting more stupid. Where did all the people had gone to? Has there been some kind of disaster been going around this place?" He asked no one in particular, seeing how the trip through the dark place had brought him to a brighter, yet disturbing scene as he walked towards the ledge of an abandoned and partially destroyed building, proceeding to look out towards the unearthly world.

"Yare yare daze. Like hell, as if I could know this would happen in the first place. Those people are being chased and terrorized by those black creatures, something that I had never seen before." Jotaro said as he watched the people as they ran from the black, skull-wearing creatures.

Suddenly, a growl came from behind him and made him snapped his head towards the sound.

It was one of the black creatures he had just started to question.

"So, what kind of beast are you? Never seen you in my entire life before." Jotaro said to the creature although he knew he would only get a much louder growl.

The creature then launched itself towards Jotaro, in which, he then called out his Stand:

"Star Platinum! The World!" As soon as he called out his Stand, time suddenly froze, giving Jotaro only two seconds to examine the creature.

"I don't want to do something so tiring, so I'm just going to get a quick look at you."

Jotaro then went on to examine the creature, doing it as fast as he could as the 'Time Stop' ability he has couldn't last more than 2 seconds.

"I don't think I can get more good looks on this creaure. Time has begun to move again."

Time then started moving again, with the creature continuing its attack. Jotaro just stood quietly as he let Star Platinum do the work.

"ORAORAORAORAORAORAORAORAORAORA! ORA!"

Star Platinum sent out a barrage of fists towards the little creature, not even giving a single moment for it to do any action, with the final blow had caused the creature to launch into a wall, breaking it in the process.

"What the hell?!"

Jotaro snapped towards the voice of another person in the same building as he was.

"There's someone else? Yare yare daze. Probably just going to take a look, although I can't say it's really safe."

Reluctant to go straight towards the other side of the wall, wanting to observe the situation.

"I reminded myself and told Koichi that to observe is to not only look around, but to look around as well as you can. And it's not just to listen, it's to listen well to the surroundings. I need my Stand to see whatever is happening over there."

Jotaro then proceeded to hide in the shadowed place before calling out Star Platinum again to look at the other side. Jotaro went on and used his enhanced vision to look at the other side of the wall.

After a few moments, he saw a man in a black suit and red hair with a mask on his face, and he was holding a katana, as if to defend himself; though Jotaro knew better.

"Now what's happening? A guy who is very shady, and two women, one of which is a blonde woman missing an arm, while the other is a black-haired woman who had fell onto the floor, possibly because of the unexpected wall explosion."

Jotaro then stood up, not really sure of what to do next. He fixed his hat, saying,

"I don't belong in this world, though it's obvious they need my help." Jotaro then picked up a debris of the broken wall, and had Star Platinum to do something.

Jotaro lifted the hand that was holding the debris, as if to aim it at something.

"Hey! Whoever is at the other side of that wall, come out!" The same voice from earlier shouted from the other side.

Jotaro just scoffed and called Star Platinum, positioning himself in a pitcher position.

The man in the mask then came through the wall, blocking out any light that was previously there before, saying,

"You know, I really don't want to do this to another people, but-huh?" The mysterious man then saw Jotaro, whose Star Platinum had screamed out,

"ORA!" Star Platinum then threw the debris, launching it in a very high speed. The man never knew what came along, as he was hit square in the head by the debris, sending him flying back towards where he came from.

The black-haired woman just watch the events that had unfolded in front of her, not able to think of anything.

"Yare yare daze." The black-haired woman turned towards Jotaro, who had come out from the wall. Jotaro then looked towards the woman, specifically the blonde with the missing arm.

"For some reason, I hoped that Josuke would use his Crazy Diamond to fix her, although I'm pretty sure I'm the only one around here."

"Who are you?" Jotaro turned towards the black-haired who had finally voiced out a question. Jotaro just stayed quiet for a few moments before breaking his own silence.

"Does it matter? I can presume a lot of people had already died by those creatures. I hope to find whoever is responsible for this, although I can't say I have a lot of time."

Jotaro then proceeded to walk towards the blonde woman, saying towards the black-haired,

"And I think beating whoever that was would satisfy you, as I can assume he's the one who had made her like this."

"You're right." Jotaro turned his head towards the black-haired girl, who in turn had her face in a terrified manner as the same voice from earlier returned from a distance.

The man in the mask from earlier struggled to walk as he constantly kept putting a pressure on his head, obviously still bleeding from the high-speed debris from earlier.

The man then pointed his katana towards Jotaro, saying,

"You have some strong arms back there, though I have to say, this is where your life is going to ended by me, you useless prick!"

Something snapped in Jotaro as the black-haired girl then came between them.

"Adam! Stop this now! No more people have to be hurt in order to stop this! So, please, stop!" The black-haired cried towards the man, Adam.

"Well, if that is what you said from your mouth, Blake, then I'm sorry we have to end this partnership." Adam made no pause as he proceeded to stab the black-haired woman, Blake, in the stomach area.

Adam then pulled out his katana, bathed in blood of Blake, and pointed it at Jotaro, who had his eyes shadowed by his hat.

Adam didn't hesitate as he sprinted towards Jotaro, who was still staying put in the same place.

"Now, it's time for you to die-Ach!" Adam then inadvertently got a fist connected to his face, courtesy of Jotaro's Stand, Star Platinum.

Jotaro went closer towards Adam's face, saying,

"You know, I've been called many things such as thugs, bastards and even pricks. But useless? That's one word I never really wanted to hear again."

Adam then was recklessly getting wrecked as Star Platinum sent a gruesome barrage of fists towards all over his body parts: Face, chest, stomach, arms, legs, and even his crotch...ouch. You name it.

"ORAORAORAORAORAORAORAORAORAORAORAORAORAORAORAORAORAORAORAORA! ORA!"

The final blow from Star Platinum sent Adam skyrocketing through the ceilings, inadvertently caused him to get sent through the roof, and was sent seemingly far away from the building Jotaro was currently in. Although in reality, Adam only landed on the rooftop.

Good for him.

Jotaro then fixed his hat, saying,

"I'm sorry for the inconvenience I have caused you two to be in. For now, I'm just going to leave you to anyone else who will pass through here first."

Jotaro then walked away, thinking,

"How or when will I get back towards where I was at Centipede Shoes? I really want to break that Stand's owner's face."

To be continued...

Next: Jotaro's Mind Had Warped! (P2)

So, yeah, this is my first try with making a crossover of Jojo's Bizarre Adventure and RWBY. Both are some of my personal favorites, by the way.

I'm sorry if something about the characters I wrote were out of character, since I can't really tell if they really speak or act that way.

Anyway, please review this. And if you want a chapter two, just say it. I'll try making some explanation about how did Jotaro get there in the first place.

So, bye!

P.S: I like how Adam got the Steely Dan treatment, like if you agree.

P.P.S: I use "Star Platinum! The World!" since it was like that in the anime.

P.P.P.S: 'Muda' is translated to 'Useless'.

Update 1: Made story arcs for this story so you can read it like how the manga works.

Update 2: Felt like making omakes/after chapters/some kind of humor/whatever you want to call it, because DUWANG-I mean because why not?

Update 3: Changed the story title again, this time because DUWANG!

"Ugh..." Adam groaned as he opened his eyes, looking up into the sky.

"What the hell just happened back there? I saw some kind of human came out of him, and then this." Adam said slowly, trying to ignore the pain that had gone through his body.

He then looked around and found himself looking at the highest point of Beacon.

"Ain't that a beautiful Duwang?"

Suddenly, soldiers started coming out of nowhere, surprising him. He tried to move, but his body parts won't response as he felt the pain surging through his body every time he tried to move.

He then saw guns pointed at him.

"Are you kidding me?"