In this fantasy world, be a Kamen Rider

Synopsis: "Host, please collect materials as soon as possible!"
"I'm really trying my best! Don't rush me!"
"Reisen, don't run away! You're a rabbit, aren't you?"
"Huh? You... what do you want to do?"
"Look at this bottle! With your blood, I can transform!"
"And Suika! Let me use yours too! You and Tank have a really high synergy!! Ouch, ouch, ouch, I can't beat you!!"
Having obtained Pandora's Box, Yoruichi possesses the ability to create energy bottles from the blood of yokai girls. This is a brand new, stronger Kamen Rider Build, imbued with yokai power, growing up in Gensokyo!