Everyone knows Ichiko as the typical well-rounded girl with numerous skills and an ego to go with them. What they don't know is that she not only has a business of hunting demons and monsters, she's the daughter of the best demon hunter out there. Now, if only she could get some new personnel to help her out.

Ichiko Sakura has no recollection of her past. All that remained were memories of being experimented on by a mysterious group. She becomes a hero to discover the truth, but the appearance of an annoying deity determined to literally suck the happiness out of her may hinder that. Regardless of what comes, she will brave it all. She will be the one. She is... Kamen Rider Build.