A war has broken out between Touto and Hokuto over the immense energy within Pandora's Box.
Kamen Rider Build, Kiryuu Sento, decides to risk his life defending Touto
from Hokuto's Kamen Rider Grease and his three lackeys.
Hi!
It's Miitan, your idol!
What's with you?
My request today...
...is that the war stops, right now!
We'll stop! If that's what you want, Miitan!
Then again, Grease hasn't really had much of a spotlight yet...
Okay, here's Episode 20!
The Hazard Trigger.
This... is the forbidden item?
Insert that into the Build Driver, and you'll tap into even greater power.
You'll be able to stop Banjou from going berserk.
But if it's forbidden, there's some kind of price, isn't there?
Bingo!
The longer you have it equipped,
the more likely you are to lose your sense of self.
The Hokuto Trio got stronger by using the Hazard Trigger.
Although, since they are Smashes,
the effect wasn't filtered at all, so they've got a higher price to pay.
If they lose...
They're dead.
You can see why it was forbidden.
Why give this to me?
Well, I kept you alive for a similar reason.
You're the only one who can stop Banjou Ryuuga.
Banjou is a natural fighter, you could say he represents nature.
And then we have you, using science to grow stronger. You represent nurture.
And what I want is the two of you to push each other on to get stronger.
But what does that have to do with your actual goal?
We'll get into that some other time.
Ciao!
It's been ten years since the Martian Pandora's Box caused the Sky Wall Tragedy.
Our country was split in three: Touto, Seito, and Hokuto,
and chaos has ensued.
I'm going to keep walking on tonight
Moving on straight ahead
Leaving only a single set of footprints ahead of me
It seems so vast, but I get the feeling you're out there
Waiting for me somewhere
With a smile that never fades
There you will...
Be the one, be the one
All right!
Who'll never give up on the Earth's future
Be the lights, be the lights
All right!
You can be stronger
Love will never lose!
Helping, saving, and embracing
Touching our hearts so that it can reach out
Be the one, be the lights
Send this message and let it ring out!
Barber Kiryuu
Why the hell did you let them experiment on you?
Well, boss, we did it for you—
Devil Trigger
Don't put this on me.
Does it really matter?
You don't even remember us.
Don't act like you actually care.
Wait, Ao...
Did they really erase your memory?
When we became weapons, we gave up our names.
We took up the nicknames Akaba, Aoba, and Kiba,
but you never even called us by them.
Is that because you remember us?
Don't be stupid.
It's just a pain to remember.
A healing power?
Yeah.
This bracelet started shining...
I was so surprised!
His wounds closed up, and then he woke up right away...
And then Misora passed out instead.
Right?
Hell if I know.
Maybe something's happened inside her body...
I'll look into it later.
Okay.
Why aren't you saying anything?
I won't lose!
I'm gonna get even stronger!
Stronger! Stronger!
I wasn't able to control myself...
Talk about sad.
If you've got a problem, let's hear it.
It's fine as long as you understand.
If you hadn't shown up, we would've lost even more bottles.
Hot!
Hazard Trigger
This Hazard Trigger is an expansion that will boost the Rider System's output dramatically.
But it carries a significant risk.
If used in combat for a long period,
the stimuli overwhelms the brain, causing a loss of rationality.
The user is then overcome with an impulse to destroy everything in sight.
Grease has attacked the archaeology museum.
Archaeology Museum
Head there, now.
Well, we can be sure that someone is passing the location of the bottles to Hokuto now.
But where's the leak...?
With these, we got 14 left...
Smooth sailing this time.
Look at these sour mugs!
If you guys wanna keep working for me, I've got one condition.
Keep yourselves alive.
Boss!
What the heck...
Enough!
Boss! Boss!
Hey! What gives?!
Quit it already!
Boss!
What is with you guys?!
Boss! Boss!
Come on, give it a rest!
We're not letting you take any more bottles.
Wanna try and take them back?
If it gets dangerous, untransform.
Yeah, I know.
NINJA! COMIC!
BEST MATCH!
ARE YOU READY?
Transform!
Transform.
GREASE!
NINNINCOMIC!
DRAGON IN CROSS-Z CHARGE!
I'll let my passion burn and crush you!
DUPLICATE SKILL!
You guys...
If you lose, you'll disappear!
We won't die.
We made a promise with the boss!
You're just like me.
You only know how to live by fighting!
What?!
Joy! Satisfaction! Pleasure!
Feels good, doesn't it?
No! That's not what this is about!
I'm getting stronger so I can stop this fighting!
Stronger! Even stronger!
Banjou, cancel your transformation!
If used in combat for a long period,
the stimuli overwhelms the brain, causing a loss of rationality.
Hey, pay attention!
Banjou!
CONCEALMENT SKILL!
BOOM!
ROCKETPANDA!
I passed out again, huh?
Tired. Want my money.
Sleeping now.
Great, now she's out.
This is getting surreal.
Why didn't you change back?
Oh man, I'm starving!
Maybe I'll scarf some instant noodles...
No
Tres- passing
The official residences aren't secure enough, so we're storing Pandora's Box here instead.
I get it. That might be safer.
Did you drag us out here just to tell us about this?
I actually brought you here to share some classified information with you two.
It's come to light that Faust is now operating in Hokuto.
At this rate, they may even begin to mass produce Hard Smashes.
So I want the two of you to go to Hokuto and dismantle Faust.
What are you saying?
You're talking about invading Hokuto.
There's no other way.
Defense and invasion are not even the same!
Then are we supposed to just give in?!
I can't reason with you.
I want nothing to do with this.
Defending ourselves won't be enough.
We have to win this war, and reunite the country.
That's the only way this is going to end!
Isn't he right, though?
If we stay on defense, the war's not gonna end.
I told you before...
We're not fighting to beat our enemies.
It's to protect the city of Touto.
But...
We need to show them we're opposed to this war.
Nobody's gonna care about that!
We have to take them down.
Do you want to show off your power that badly?
Say what?
It's true that you're stronger.
But that's because of the Sclash Driver.
Don't get too cocky.
Screw that!
I was trying to...
Need something else?
Not from you.
I need to talk to him.
Come with me.
I bet if Himuro Taizan was still in charge, this war would've never happened...
Whatever happened to him, anyway?
He's still in a coma.
Maybe my power can heal him...
But will they believe us about your power?
Welcome back. Where's Banjou?
I don't know or care.
Did something happen?
He's not taking this war seriously.
All he can think of is fighting, just because he got a little bit stronger...
Stupid muscle brain.
That's not it.
Though it's not really a surprise.
He thinks this is his fault.
Which is why...
I wanna wrap up this war as soon as possible.
He said he was going to help you, this time.
Banjou wants to end this war as soon as possible for your sake, Sento.
Excuse us...
Coming through.
Hang on!
I remember you!
Hurry!
Open up!
Open the door!
Where's Banjou?
Where is he?
Come take a look at this.
The rats have fallen into my trap.
Seems Pandora's Box is in here.
Are you sure...?
Now, where is it?
Where the heck is it?
I made the right move circulating that fake intel.
They would be a hindrance to taking Hokuto down.
What are you talking about?
Banjou Ryuuga is on his way to Hokuto with a contingent of our troops.
We're on Sky Road now!
Listen up! We're officially on the battlefield now.
Keep that in mind from here on out!
I'm gonna end this war...
Why would you make him do that?!
If we don't crush Faust's presence in Hokuto, things will only get worse for Touto.
We're justified in our defense.
But sir, even the acting prime minister doesn't have the authority to unilaterally start an invasion—
Shut up!
I make all the decisions.
I am the leader of this country!
You don't deserve to lead this country!
Prime Minister!
Dad... how?
Misora healed him.
She did?!
I will not abide an invasion into Hokuto. Have them withdraw, immediately.
Listen to me. This is what's best for Touto!
If we don't attack right now, we'll be...
You need to stop!
Leave Touto, now.
I don't have a son anymore.
Suit yourself.
Then I'll just do what I want.
BAT!
MIST MATCH!
Vaporize.
BAT
FIRE!
Gentoku?!
Night Rogue?!
Pandora's Box...
...belongs to me!
HAWKGATLING!
YEAH!
You're not getting away!
I won't let you take Pandora's Box!
It's time we settle this.
No good... feel so weak...
Hey, on your feet.
Too numb...
Can't breathe...
Boss, even if you have to go alone, get out of here!
What are you talking about?
SINGLE!
SCRAP FINISH!
TWIN!
TWIN BREAK!
We're saved!
If you have a move like that, you could've used it sooner...
You don't get it.
Pulling out all the stops like that means...
Boss!
Something stinks...
Maybe they're getting serious about going to war with Hokuto?
You guys go on ahead and sniff around.
But...
I said go!
Come on.
Alright, let's do it.
RABBITTANK SPARKLING!
Build Up.
ARE YOU READY?
RABBITTANK SPARKLING!
YEAH YEAH!
I've got the winning formula!
This is absurd!
I won't be stopped...
...in a place like this!
What?!
READY, GO!
SPARKLING FINISH!
So this is the power of the Rider System...
It's over.
It's not over yet!
You people haven't seen the last of me...
I'll return with even more power at my disposal.
We're not letting you into Hokuto!
Attack!
DRAGON JELLY!
Transform!
CRUSHED! OOZING! OVERFLOWING!
DRAGON IN CROSS-Z CHARGE!
What are you doing?!
Stop! That's enough!
Shut up, and back off!
I'm gonna win!
I'm gonna keep winning until the war is over!
Banjou...
Banjou wants to end this war as soon as possible for your sake, Sento.
That muscle brain...
Is he trying to make me cry?
HAZARD ON!
I'm going to stop you.
No matter what it costs me!
RABBIT! TANK!
SUPER BEST MATCH!
CLASH! CLANG! CLASH! CLANG!
ARE YOU READY?
Transform.
THE UNCONTROLLABLE SWITCH!
BLACK HAZARD!
OH, NO!
Kamen Rider Build!
N
E
X
T
So that's the forbidden item...
Hazard Form is too powerful...
Did I do this...?
Hazard Form is too powerful...
I want to settle this with a one-on-one battle
Hazard Form is too powerful...
Sento's heart sinks into darkness!
between representative fighters.
Sento's heart sinks into darkness!
I'm going to let my passion burn and beat you.
Sento's heart sinks into darkness!
The Unstoppable Hazard
You have to fight.