After the defeat of Evolto, Kamen Rider Build and Cross-Z, Akira Kiryu and Ryuken Geki lived in the fused world. That is until Killabus the brother of Evolto erased the memories of Akira and the only thing he has is a rabbit. It's up to Ryu to help...
Starting off with the member of team Build and their lovers to follow Gentaro sneakily for good reason as Gentaro told them that the place they'll be going is out of this world and plus their outfits will stand out and some staff will question them
Sona: "Ok how long is this gonna take?"
Gentaro: "Don't worry we're almost there." Then they all enter a room which was old "And here we are." Then he points at a locker
Momo: "A locker?" She whispers to the others "He's insa-" Then Gentaro opens the locker to which a bright light appears
Gentaro: "Enter in." Then they all enter Akira wasn't shocked because of his fourth wall knowledge skills which made him know about what's gonna happen next as they follow towards a door and as they open the door
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Everyone else except Akira: "What the?"
Gentaro: "Welcome to the Rabbit hatch!"
Akira: "Well then."
One long introduction towards each other later
Ryu: "Wait if it's called the rabbit than does that mean?"
Akira: "Long story short we're on the moon."
Ravel, Ryu, Akeno, Sajt, Sona Hyami, Momo, Itsuki, and Xenovia: "FOR REAL?!"
Akira: "Yep." Then they look outside to see the planet Earth
Ryu: "WHAT THE HELL?!"
Akira: "Huh you know it's funny that makes you the first devils to travel to space." He laughd
Gentaro: "Eh? Devils?"
Akira: "Oops looks like the cat is out of the bag. Well since you told is about your secret I'll tell you ours. You see we are from another dimension where the supernatural is a thing. Devils,Angels, you name it, it's probably there."
Gentaro: "Wait so you all are devils?"
Akira: "Well one is a pure devil." He points at Sona "The four are humans reincarnated into devils." He points at Momo, Saji, Akeno, and Xenovia "The rest of us are human except for him." He points at Ryu "He has some alien DNA."
Gentaro: "EH?!" He went up to Ryu "What kind of abilities can you do?!"
Ryu: "Nothing usual I can create fire from my hands and feet plus I can transform. There's nothing too special about me."
Gentaro: "EH?! Don't doubt yourself you have something that they don't have so try to be glad of your talent!"
Ryu: "Wow for once he sounds like a great guy."
Gentaro: "What about you three?"
Itsuki: "I'm an expert in hand to hand combat. Same for him." He points at Hygami "Though he has less experience than I did."
