Disclaimer: I do not own Kamen Rider Ryuki nor RWBY. RWBY belongs to Rooster Teeth, Kamen Rider belongs to Shotaro Ishinomori. Enjoy!

"Speak"

Thought

"VENT"

ADVENT CARD

Jaune was in the middle of a spar with Pyrrha as he parried her wooden spear with his sword and used his shield to slam into her right side, dropping the spear. He then slashed the shield she had and slashed more and more. Pyrrha jumped back and grabbed her spear to throw towards Jaune. Jaune is knocked off his feet and is disarmed of Crocea Mors, while Pyrrha holds the wooden spear towards his head.

"I see you managed to catch me off guard", Pyrrha remarked. "Although I got you in the end, I'm still proud of you".

"Thanks", Jaune replied. He then looks at the time on his scroll; it's about 6:30. "Look, I'll go take a shower, and I'll meet you at the hall of dinner, okay?"

"Okay, bye Jaune, just be back soon. People have been disappearing without a trace".

"Don't worry Pyrrha, I'm a trained huntsman. I can handle myself."

Jaune left the sparring area, heading to the showers and as he left, a faint visage of an eastern dragon, hidden within the moats of Beacon Academy.

Jaune entered the team dorm, just grabbing his regular Pumpkin Pete hoodie and some blue jeans. He picks his Scroll back up accidentally drops a few of his textbooks on the floor.

"Ah, geez", Jaune told himself as he picked up the books from the floor. As he picked up the final book, Jaune found a small box, black in color, and holding 2 cards within, a CONTRACT and a SEAL.

"What are these things?", Jaune asked himself. "Did Nora get some new trading card game? Nah, trading card games have more cards than this." Jaune goes off to the dinner hall, accidentally mistaking the deck for his scroll. The broken moon shined down on the night scene of Beacon Academy as Jaune went off to the cafeteria hall to meet up with Pyrrha. Jaune tried to pull out his Scroll to call her only to see that he took the deck by accident. "Ah, stupid me", Jaune cursed to himself." Now I gotta go back". Then, out of the blue, a shrill reverberating noise rings out, hurting Jaune's ears. He then looked around to see what was going enough, the other students did not react, as if Jaune was the only one hearing it. Jaune looked more, and in the moat was a large, eastern red dragon creature . "Is that some new Grimm!?", Jaune thought as his mind raced, his heart coming to a dead stop. He freaked out the instant he saw it and made a break for the cafeteria hall, where he knew Pyrrha was waiting outside.

"PYRRHA! PYRRHA!", Jaune frantically called to her as he managed to see her from the distance he was at. Jaune was sure Pyrrha could help him fight off this new Grimm.

Jaune?, Pyrrha wonders while she saw her blond crush run towards her in a frantic mess. Jaune then accidentally trips and falls onto a reflective stone before a bright flash of light envelops him Jaune, leaving no trace.

"JAUNE!", Pyrrha screams seeing him disappear into nothing. She then sees a large monster spider crawl from reflective surface to surface. Pyrrha now realized what was happening. She ran off to the Beacon moats and pulls out a white deck, like Jaune's, but with a gold swan emblem. A silver belt forms onto Pyrrha's waist as she holds her arms out. "Siren", she slides the deck into the belt, forming reflections around her body before transforming into Kamen Rider Siren, a rider with a swan motif and a white flowing cape. She jumps into the moat, entering where Jaune just went.

"AHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH"! Jaune was caught into the new world and was falling for what looked like an eternity. Jaune then transforms himself into a silver and black suit of armor. He then landed back to Beacon, but something was off. Jaune looked on as the directory signs were mirrored, and the rest of Beacon was reversed, along with buildings, trees, and the moon as well. Jaune also realized he was in a suit of armor, looking down at the deck in it's belt buckle. "So this is what the deck does". Clashes of steel were heard as Jaune wondered if there was anyone else in this unreal hellscape. Jaune caught side of Pyrrha as Siren facing off against Dispider as she used her Blanc Visor to fend it off. Pyrrha pulls a card out of her deck and slides it into her Visor, saying out "SWORD VENT". A double bladed sword, the Wing Slasher falls out out of the sky to help Pyrrha while she fights the spider.

Jaune took a card from his deck too and puts it in his Visor, also saying out "SWORD VENT." A simple sword comes to Jaune's aid, allowing him to come to Pyrrha's aid. He charged forward with his sword and prepares to strike. "AHHHHHHH!", Jaune yells while he charges to strike Dispider, only for the sword to shatter in pieces."Wha?", Jaunes replies in shock before getting knocked by the monster spider. "JAUNE!", Pyrrha yells as she runs to Jaune, lying on the ground before realizing her fingers were disintegrating. "We have to get out of here, we won't last long", she informs Jaune as they both exit the other world. Jaune and Pyrrha return to the real world while they take a breath to realize what just happened.

"Pyrrha?", Jaune asks in just happened?"

The two now sit at their private training spot with some sandwiches and some Pumpkin Pete drinks as Pyrrha explains what has been happening.

"There is a world next to ours, where a bunch of those Grimm like monsters exist. We call it the Mirror World. They have been the ones taking people and eating them for food. The only people who can enter and fight those monsters are the ones holding these decks. We are are called Kamen Riders." She pulls out her Siren deck. " I am Kamen Rider Siren and you are not a Kamen Rider". Pyrrha takes Jaune's deck away from him while Jaune's munching on his sandwich. "Hmphey!", Jaune complained while still chewing his sandwich.

"Kamen Riders are supposed to fight each other to the death until one lives", Pyrrha reveals with tear in her eyes. "I don't even want to think about killing you, Jaune. You're a good person, and you're a good friend even more."

"But Pyrrha, these monsters are taking people. If this deck can help me save them, I'll do it even if it kills me.

"Jaune, you can't do anything while in Blank Form. You have to get a contr-" Pyrrha stopped her

words before revealing too much.

"What? Contract? With what?" Pyrrha threw the blank deck far into the Emerald Forest and ran off.

"Pyrrha, wait!" But Pyrrha was too far for Jaune to reach for her. Jaune looked on in sadness as he was now

THE NEXT DAY

Jaune couldn't focus of Professor Port's lessons. Granted, he couldn't focus on Professor Port's lessons in the first place, but he was racked with guilt and sadness while looking at Pyrrha, who wouldn't even look at him once. Even Team RWBY saw there was something wrong with Jaune and Pyrrha.

"Man, Jaune looks way more down than usual. Weiss did you shoot him down again?", Ruby asked her partner.

"What? Ruby don't be silly. Besides I didn't see him all of yesterday", Weiss retorted, scoffing off Ruby.

"Maybe Jaune got some trouble from back home", Blake theorized, her face still into her Ninjas of Love book.

"I'm guessing Cardin knocked Jaune off his ass again in another fight" Yang joked to her teammates.

"LANGUAGE!", Port warned to Team RWBY, interrupting the lecture."By the way", Professor Port alerted, "I have a new teaching assistant here". A young Japanese woman, 19 years of age with short hair walks in. This is Ms. Yui Kanzaki. She will be helping me throughout the semester."

"Aw come on, Port! You just have her to get your rocks off!", Cardin Winchester yelled from the seats, leaving Yui a deep embarrassed and angry red.

"How does 3 months of detention sound for you young man?" Port replied calmly as Cardin grew pissed as well.

"Swear to Oum, I'll feed that fat butterball to the animals", Cardin remarked in a disturbing way, even scaring his own teammates.

After classes, lunch came around. Team JNPR was waiting in line, Nora still hyperactive as usual, and Ren still nonchalant as usual but Jaune and Pyrrha were unusually silent.

"Hey, what's wrong with you two? Relationship problems perhaps?", Nora questions, hoping these two would finally be "together-together".

"Wha? Nah, It's something far more complex", Jaune tells her while looking away from Pyrrha, accidentally bumping into Yui.

"Oh, I'm so sorry, it was my fault", Yui apologizes.

"No, it was ours", Jaune explains," By the way, you want to sit with us for lunch? We're welcoming!"

"Sure, thank you…uh..."

"Jaune Arc, short, rolls of the tongue, ladies love it", All three other members of JNPR roll their eyes while Yui laughs at the silliness of it. All of Team JNPR sit down at their table, enjoying their meals silently. "So Ms. Kanzaki, want to tell us anything about you ?", Nora asked out of curiosity.

"Well, I have been living with my grandmother ever since my parents died, and I ave an older brother who writes to me from Atlas every so often. As for why I joined Beacon staff, I felt drawn here after looking for a job. And please call me Yui. Ms. Kanzaki is a bit flattering for me, I'm only 19."

Lunch almost was normal for Team JNPR again until the shrill mirror noise rang out, alerting Jaune, Pyrrha, and for some weird reason, Yui. Before Jaune could process why Yui was hearing the noise, Pyrrha decided to knock him out cold and left him down on the floor to everyone's shock. She then ran off from the team while Yui followed. Ren looks on while Nora is somewhat worried.

"Nora, I think it's time we go", Ren remarks before both leave Jaune on the floor.

Pyrrha paces across Beacon campus before coming across the same Dispider dragging a poor janitor into its jaws for catches up in time as Pyrrha takes out her deck and becomes Siren once again to defeat the monster spider. She first uses the 2 cards she drew and inserted them into her Visor.

"SWORD VENT"

"GUARD VENT"

Both her Wing Shield and her Wing Slasher at the same time to assist Pyrrha as she takes on Dispider, but it's not enough. She will die if help doesn't come.

Jaune was currently washing his face to wake himself up from the knockout he just got and was half awake, until seeing a man next him in the bathroom mirror. "You are a Rider, you must fight", the man said in a dark intimidating voice, "if you don't fight you won't survive". Jaune looked behind, realizing this figure only existed within the mirror.

"How? I can't do anything without my deck and even if I did, I still don't know that whole Contract process".

"Take the CONTRACT card and hold it in front of the dragon, there you will find power, but once you make a contract, you are bound to this battle until death"the man said before leaving the once tossed deck on the sink, eventually leaving the mirrors. Jaune picks up the blank deck, and knows what he has to do. Jaune went to the glass structures, looking in hopes of seeing the dragon once again. And there it was; Dragedder, hidden in the reflections, only visible to Jaune. Jaune pulled out the CONTRACT card as grew closer, peering at the lone human with an interest. Dragedder suddenly escaped the Mirror World, flying towards Jaune. Jaune flinches in fear, only for the dragon to disappear into the card, giving him a new card with Dragedder called ADVENT. Jaune now looked to his deck, how with a dragon head emblem. He holds his deck to the windows, summoning his Advent Belt. "Dragon Knight", Jaune shouts before inserting the deck, first transforming into Blank Form, then bursting into fiery red blasts of energy, finally becoming Kamen Rider Dragon Knight. He then launches himself into the Mirror World, encountering a weird, bulky motorcycle. Dragon Knight enters the motorcycle and races off into Mirror World to find Pyrrha.

Pyrrha was almost finished with fighting off the monster Dispider when out of nowhere, a squad of lizard like people armed with giant shurikens ambush her, disarming her of her swords and ready to beat her, until a new voice rang through the Mirror World.

"SWORD VENT".

A red figure slashes 2 of the newt monsters while he punches another away from Pyrrha while he picks her up from the ground.

"Jaune?", she asks, shocked and bewildered at Jaune, now officially in the Rider War.

"Sorry I went against you", Jaune replied, "But we have to fight off these monsters!"

Jaune went two take 2 more slashes at Dispider before pulling out another card to use in his Drag Visor, saying out, "STRIKE VENT". The head of Dragedder appears now on Jaune's right hand, with the dragon also next to him. He then raises the dragon's head towards the Dispider, Dragedder breathing plumes of flames towards the spider menace, leaving it recoiling in pain.

"Use your Final Vent!", Pyrrha yelled out as she used a white card with her emblem, labeled FINAL VENT and inserted it into her Blanc Visor.

"FINAL VENT"

A great, majestic swan, Blancwing flies to the battlefield, and with its wings, great gusts of wind were created to lift the newt monsters from their feet. Then, in almost lightning speed, Pyrrha cut the newt monsters down to pieces with her Wing Slasher, their bodies disappearing into balls of light for Blancwing to consume. Jaune follows suit as he pulls a FINAL VENT card out of his deck and slots it in the Drag Visor.

"FINAL VENT"

As if it was instinct, Jaune prepared for the finisher, posing as Dragedder flew to his side. Jaune then flew high above the air, as Pyrrha watched on. Then, Dragedder blasted his flames at Jaune, propelling the Rider toward to a flying kick, finally destroying Dispider once and for all. The remains of Dispider turn into a ball of light, now being feasted upon by Dragedder.

"Just what happened?", Jaune question as he takes in all of what happened.

"You used your finisher, a Final Vent. They can fully destroy both riders and monsters. The remains of monsters can be eaten eaten by ours to grow stronger." Pyrrha looked to her hand again, slowly disintegrating." We have to leave here, now". The 2 riders now went back to the glass windows from where they came, coming back to the real world as regular Jaune and Pyrrha.

"Damn It Jaune, I told the risks of the Rider War, other riders and I will have to kill you", Pyrrha shouted in her frustration.

"Well, I'm a Huntsman in training, death is alway constant in our lives", Jaune remarked. "Besides, you're my friend too, and I can't abandon you in this fight." Pyrrha's face lost it's worry and soon grew into a small smile as she looked into Jaune's eyes. "Thank you", Pyrrha replied, the two reconciling in a hug. Of course, Yui happened to view all of the fight in the Mirror World and the talk after. Jaune then went up to Yui due to him seeing Yui react to the mirror noise in the cafeteria hall.

"Yui? You're a rider too?", Jaune asked, still defensive over the idea other riders.

"No, but I know of the Mirror Monsters, the Kamen Riders, and their origins". She takes her Scroll out and with a few swipes, pulls up a picture of her and her older brother, the older brother being someone both Jaune and Pyrrha recognize instantly.

"HEY! That was who returned my deck!", Jaune replied in surprise, still trying to put everything together.

"How do you know the Mirror Man?", Pyrrha asked, her tone demanding of answers.

"The man who granted you your decks is Shiro Kanzaki, my brother", Yui answers, with a tinge of sadness as she reveals the truth. " I don't even know why my brother is doing all of this horror! Please, help me stop him, so all of this, the monsters, the killings, the fighting can be stopped! Please?" Jaune and Pyrrha look uneasily at each other, but they see that they have to help Yui."We'll help you, not just for your sake, but to stop the monsters from hurting anyone else". Yui smiles at them and the three now agree to defend Remnant.

A lone figure walks throughout Vale, shrouded by the dark of the night. Within the shop windows, large, humanoid crab, stalks the figure before the figure stops the crab, and pulls something out of his pocket. It was a deck, black like Jaune's, but with a crab insignia. The man smirks and looks towards downtown Vale.

"Wait till they get a load of me."

Hey, this is my second story here on , I always had this idea of combining these 2 series for a while. Scissors is now in the battle, but who is it? Find out next time on Remnant Rider Dragon Knight!