A war's erupted between Touto and Hokuto over the immense energy within Pandora's Box.
Kamen Rider Build, Kiryuu Sento, attempts to stop Hokuto's invasion,
but is forced to use a forbidden item in order to stop Banjou from going berserk...
Is it true that forces from Touto are headed towards Hokuto?
Hokuto's Prime Minister Tajimi!
I'm afraid I'm unaware of any...
Do you really think I would fall for that?!
SUPER BEST MATCH!
We'll manage something in episode 21!
CLASH! CLANG! CLASH! CLANG!
ARE YOU READY?
Transform.
THE UNCONTROLLABLE SWITCH!
BLACK HAZARD!
OH, NO!
That's the forbidden item...
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!
The Unstoppable Hazard
I'm not letting you into Hokuto!
I'm going to end the war!
And I won't let anybody get in my way!
Snap out of it!
My consciousness...
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.
MAX HAZARD ON! CLASH! CLANG! CLASH! CLANG!
READY GO!
OVERFLOW!
OH, NO!
Holy crap...
He almost killed us!
Let go!
MAX HAZARD ON!
CLASH! CLANG! CLASH! CLANG!
This is bad...
READY GO!
Run!
OVERFLOW!
OH, NO!
CLASH! CLANG! CLASH! CLANG!
Don't do it!
READY GO!
HAZARD FINISH!
Stop it, Sento!
DISCHARGE BOTTLE!
DISCHARGE CRASH!
Hey!
Hey! Come on, hang in there!
I'm worried...
Because you're kinda... useless without me, Boss...
No matter what happens...
I'll be with you.
No way...
Did I do this...?
Let go, Boss!
Screw you! Screw you!
You bastards! You bastards did it!
Let go of me, dammit!
Boss, let go!
Screw you!
It's been one week since the government of Touto has renounced the military use of Kamen Riders,
Kamen Rider Military Use
One Week After the Withdrawal
but Hokuto's invasion continues, as criticism increases over the government's response.
The bottles at the M2 facility and the ones at the factory have been stolen.
That just leaves the ones at M4 and the government residences.
Build's only been gone a week,
and it's gotten this bad...
Is Sento not going to turn into Build anymore?
Even if he wanted to, he handed all the bottles over to the government.
Yeah...
Besides...
He can't like that.
It is likely that the Kamen Riders will continue to perpetrate more acts of terror.
Anyone in the vicinity of a battle is advised to remain inside, until it's safe.
If I could have controlled that power...
We repeat, it is likely that the Kamen Riders will continue to perpetrate more acts of terror.
He wouldn't have gotten hurt like this.
Anyone in the vicinity of a battle is advised to remain inside, until it's safe.
We've got an eyewitness' report!
Grease and his guys were seen headed towards facility M4.
Where's Build?
I'm more than enough for you guys.
DRAGON JELLY!
Transform!
CRUSHED! OOZING! OVERFLOWING!
DRAGON IN CROSS-Z CHARGE!
This is for Ao!
I'm going to protect Touto!
I will! I will...!
I'll do it!
Why'd you stop?
You screwing with us?!
Enough.
Let's go.
I'm sorry.
Because of me...
Your friend...
If you're not ready to do what it takes, stay off the battlefield.
There have been considerable casualties to both sides of this war.
I don't want this to last any longer than it needs to.
With that said,
I propose we settle this in a one-on-one proxy battle
with Kamen Riders representing Touto and Hokuto.
A proxy battle?
These are the bottles you gave to us.
It may seem strange after releasing you from your assignment,
but I don't want to see the citizens of Touto suffer any more.
We need your strength.
I empathize with your grief, but this is to protect Touto.
Please, help us.
I...
I don't want to fight anymore.
Yo.
I-I'm sorry...
Sorry...
What have I done...?
I see you came by first.
Hit me, please...
I've done something horrible...
Something I could never atone for...
I beg you...
Just hit me until you're satisfied...
I heard about the proxy battle.
I'll hit you all you want, if you show.
I'm not doing it!
Then Touto is ours.
Aikawa Shuuya.
That was his real name.
He was a good guy, who cared about his friends and would cry for complete strangers.
You didn't do anything wrong.
That stuff about not letting anyone die was never gonna work.
I've seen plenty of people die before.
That's what war is.
He knew well that his life was at stake.
He lost because he was weaker. That's it.
That's not on you.
But it doesn't change the fact he was someone I really cared about.
Which is why...
I'll let my passion burn, and beat you.
Call History Kiryuu Sento
Yo.
I heard you didn't want to be the rep for the battle.
What's so funny?!
I guess you still don't get it.
Look, you and that dead Aoba guy...
From the moment you were dosed with Nebula Gas, you stopped being human.
All you did was break a weapon.
Plus, this is a war, so it was bound to happen someday.
Or did you seriously think you could get away without hurting anyone?
Because, if so... you couldn't be more naive.
It's up to you if you want to participate in this fight.
But if you don't, who do you think is gonna fill in for you?
Banjou.
He already feels guilty about what happened to you.
So if you won't do it, he definitely will.
But he can't beat Grease yet.
And when he loses, the Touto government is gonna hold him responsible.
You have to fight.
I know you realize that.
That's what you hoped to realize by coming here, right?
Shut up!
What do I do?!
What am I supposed to do?!
You just need to beat Grease.
I can't...
I just can't...
Afraid of losing yourself again?
Relax. There's a way you can win.
The greatest strength of the Build Driver
is it has a power which can't be measured with a Hazard Level.
You can use these.
You need to master these bottles in the week before the battle.
COBRA!
Vaporize.
MIST MATCH!
COBRA!
FIRE!
Get up.
If you fight me, you'll be able to figure out how the bottles are most effective,
along with raising your Hazard Level.
And if your Hazard Level gets high enough, you might even master the Hazard Trigger.
Why are you hesitating?!
I thought you had something you wanted to protect?
I thought you wanted to fight for the justice you believed in?
Or was that all a load of crap?!
This is terrible...
It hurts so bad,
and I can't stand it...
But I still have to fight, huh?
PHOENIX! VACUUM CLEANER!
ARE YOU READY?
Transform!
Come on, is that vacuum cleaner just for show?
ROSE!
No good at all!
You're not exploiting either of their specialties at all!
Shut up!
ROSE! HELICOPTER!
BEST MATCH!
ARE YOU READY?
Build Up!
THE PROPELLER OF PASSION!
You got a real red and green thing going on, huh?!
ROSECOPTER!
READY GO!
VORTEX FINISH!
YEAH!
Best Matches are even more potent than I figured!
But you're still not done, Sento!
TURTLE! WATCH!
BEST MATCH!
We will now hold the battle between the representatives of Touto and Hokuto.
Begin!
Kamen Rider Build!
N
E
X
T
You and I made Build, together!
The duel begins! Build VS Grease
I'm not exactly playing around here.
The duel begins! Build VS Grease
Will the black weapon decide the battle?!
Build was...
Will the black weapon decide the battle?!
Destroyed...?
Will the black weapon decide the battle?!
Gonna have to whip it out, huh?
Will the black weapon decide the battle?!
Tearful Victory
Don't! Sento!