"Host, hurry up and collect materials!"
"I'm really trying! Stop rushing me!"
"Reisen, don't run! You're a rabbit, aren't you?"
"Huh? Wh-what are you going to do?"
"Look at this bottle! With some of your blood, I can transform!"
"And Suika! Let me use some of yours, too! You have amazing compatibility with the tank! Ouch, ouch, I can't beat you!"
After obtaining Pandora's Box, Yega gained the ability to turn the blood of youkai girls into Fullbottles. This is the story of a brand-new, more powerful Kamen Rider Build, empowered by youkai, as he grows in Gensokyo!
