Intro:Go!Now!Alive A Life!Neo!

https://youtu.be/NT-pnJL3h50

Union Academy(3rd POV)

At the headmasters office,we see Ozpin,Nezu,Michael,Ironwood and Enterprise is explained about the situation in Union City.

Michael:So how do we handle about this serial killer in Union City?

Ironwood:I'll say that we will capture him and execute him after what he done.

Ozpin:I agree.I'll send my students to get him.

Ironwood:Then I will send my soldiers for support.

Sirzechs:Good.The meeting is over.

They got off their seats and head out expect Nezu.

Nezu:*Sigh*What have this academy become...now it became for fame and money.I won't forget about they betray Azazel and kill him...They will pay..

But then a hand appear from his shoulder as Nezu look up and it was Enterprise.

Enterprise:You not the only one.We have to stop them.

Next Day(Union Street)

We see Issei,Gasper,Ingvild and Lubbock are exploring the city.

Lubbock:So should we watch out about those Union heroes?

Issei:Yeah but if we saw them...

Suddenly he see Team CRDL,Rias and her peerage and Team RWBY are going to find the serial killer.

Issei:There they are.*Point at them*

Gasper:What do we do?

Issei:....Follow them.I won't let them hurt anyone.

They nodded and follow them but unknown to them,Saji and his team already saw them.

Abandoned Factory

We see Riser walk into the abandoned factory as he sit on a broke chair.

Riser:*Calm*Ah...

Suddenly he see Team RWBY,CRDL and Rias as they bring some of the atlas soldiers.

Riser:*Grunt*Can't you guys just give me a rest?

Blake:Surrender yourself!You will come with us.

Weiss:You are arrested for hurting our students and killing innocent people!

Riser:You guys don't know that you also kill a lot of innocent too huh?

Rias:Silence!You will pay for hurting one of my peerage!

Riser smirk as suddenly a mirror came out with his contract monster Venosnaker as it start attacking them.

Ruby:What the?!

It start split a steam of venom at some of the soldiers as they screamed in pain and dies.Ruby tried to hit but no use as it charge at Cardin and start eating him.

Cardin:AAAHHHH!!!

(Mercury(Scissors):.....Nice that I don't get eaten by it this time.)

His Team:Cardin!

Yang:How dare you!

Riser:*Smirk*Have fun of it.

He run off as Venosnaker got into the mirror.

Blake:Wh-what just happened?!

???:Union?!

They look behind and saw it was Airi Todoroki as she bring her teams.

Stelle(Honkai:Star Rail)

March 7th(Honkai:Star Rail)

Dan Heng(Honkai:Star Rail)

Female Zi-O

Rias:*Glare*Mahora!

Ruby:Rias!We should get out of here!We no match with them!

Rias:Whatever!We will meet again!

She then teleport herself with Union students back to Union Academy.

March 7th:What are they doing here?

Airi:I don't know.Our headmasters send us here to investigate.

???:Anyone here?

It was reveal is Issei and his team as Airi and her team look back and saw them.

Lubbock:There someone!

Stelle:Huh?Who are you guys?

Airi:Wait...that guy look familar.

Dan Heng:*Glare*Are you with Union?!

Ingvild:Huh?No we not from Union.

Suddenly Gasper get kicked by someone from behind as it reveal is Saji and his team.

Airi:*Shocked*Onii-chan?!

Issei:You follow us?!

Saji:*Smirk*Yeah.Now it time to be in your grave!

Saji and his team pull out their card deck as beside the broken mirror came out with V-buckle and attach to their waist as they does their pose.

Saji/Mecury/Shoto:Henshin!

They insert to their V-buckle and transform into their Kamen Rider.

March 7th:*Surprised*They transformed?!

Female Zi-O:As a Kamen Rider?!

Issei:*Look at Gai*No we not going in our grave!*Pull out his Card Deck*Henshin!

They insert to their V-buckle and also transform into their Kamen Rider as they charge at them and start attacking as Airi and her team was watching them fighting each other.

Stelle:Why are they fighting each other?

Female Zi-O:I don't know..I thought Kamen Rider were friendly.

Gai punch Raia away as he look at Airi and her team.

Saji(Gai):Huh.More people to enjoy with!

Tiger then notice them.

Shoto(Tiger Ancient)(Mind):That girl again...?!

Gai charge at them as he summon his weapon to attack them.

Shoto(Tiger Ancient):No!

Strike Vento!

He came in front and slash Gai away using his both claws.

Airi:Onii-chan!

Saji(Gai):Shoto..why are you protecting them?

Shoto(Tiger Ancient):No matter what,I won't let you hurt them!

Saji(Gai):So you betray us huh?I won't forgive you!

Gai start attack at Tiger as they move away.

Female Zi-O:That your brother Shoto?!

Airi:Yeah but..this is not the Onii-chan I know..

Meanwhile at Ryuki as he dodge the attack from Scissors while Verde punch him away as Ryuki about to attack but then Scissors insert his card to his weapon.

Advento!

Suddenly his contract monster Volcancer came and slam Ryuki away as he got down and Scissors insert his finisher card.

Final Vento!

Volcancer launches Scissors into the air as he rapidly spins and about to deliver it to Ryuki.

Lubbock(Verde):*Run Toward To Ryuki*Issei!

He came in front as he got hit through by Scissors and his card deck is drop to the ground and shattered as he got down and transform back to human as he is injured.

Ingvild(Femme):Lubbock!

Gai and Tiger clash at each other as they look in front and Ryuki run toward to Lubbock.

Issei(Ryuki Ancient):Lubbock!Stay with us!Lubbock!

Lubbock:*Hold Ryuki hand*Issei....I glad that I team up with you guys...

Ingvild(Femme):Lubbock...please...

Lubbock:Hehe...Ingvild..you remind me of Najenda...although I didn't..have brave enough to...be her as my crush...

He look at his hand as it start fading away slowly.

Lubbock:Issei...I have a wish...my really real wish for it...

Issei(Ryuki Ancient):Wh-what is it...

Lubbock:No matter what.....you must...end this rider battle..

Then he fade away and disappear as Airi and her team are shocked.

Airi:Wh-what is this kind of battle?!

Issei(Ryuki Ancient):AAAARRGGGHHH!!

He punch his fist on the ground but then Scissors laughed.

Mercury(Scissors):Pfft Hahahaha!Finally I kill one Saji.

March 7th:*Angry*How dare you laugh!

Mercury(Scissors):So what?You guys were not part of this battle.

Stelle:What battle?

Mercury(Scissors):A battle where everyone fight against each other and last one will granted the wish.

Airi:But...you kill him with no mercy!You only care about you winning!

Suddenly a flame blasted from behind and hit Scissors as he got down and reveal is Ryuki fire his dragon.

Issei(Ryuki Ancient):You kill..one of my friend..and..now you will pay for killing him!

He about to charge in front when suddenly Gai slash Ryuki away as Femme and Raia grab him.

Gasper(Raia):Issei!

Saji(Gai):Great job for taking care that guy.Now we fight them.

Mercury(Scissors):Gladly.

Shoot Vento!

Suddenly a shot was fired at them as it reveal is Zolda holding his big gun.

Female Zi-O:A green bull rider?!

He then fire another shot and hit at Gai and Scissors as they back away.

Azazel(Zolda Ancient):*Throw his big gun*This will teach you guys a lesson.*Pull out his card*

He then insert to his gun.

Final Vento!

Then his Magnugiga appear in front as he insert his gun to it.

Shoto(Tiger Ancient):Oh no..*Look at Airi*Run!

He run toward to Airi and her team as he insert his card to his axe.

Advento!

He then protect Airi with his body while his Destwilder protect her team as Zolda press the trigger and it fire a lot of lasers and missiles at them as it start hitting everywhere and exploded.

Every Kamen Rider(Expect Zolda):AARRGGHHH!!!

Zolda then fire finish as he walk away and leave the scene.Ingvild is carrying Raia to somewhere while Saji and Mercury run away from the scene.Airi and her team woke up as Airi saw her brother in human use his body to protect her.

Airi:Onii-chan...?

Dan Heng:Airi you're okay?

Airi:*Got up*I'm fine..*Look at Shoto*but I don't know what do we gonna do about my Onii-chan..

March 7th:Hey!What about that one?!

She point at Issei who is unconscious on the ground.

Airi:Maybe we can give them to the headmasters to deal it.Come on guys.Let bring them back to Mahora Academy.

They nodded as Female Zi-O carry Issei on the back while Airi is carrying her brother on her back too.

Airi(Mind):Onii-chan...I really want to know...what happend to you..why are you different...

They leave the abandoned factory but then the same blue shark rider came out and look at them.

He then pull away his Card Deck as he transform back to human and reveal his appearance.

The mysterious man then left the scene as the scene show the shattered mirror are back together and black out.

Outro:

https://youtu.be/qiDjYD-uRBY

Next:Ep 6:Mahora Interrogate And Black Bat