To be stronger and more beautiful than anyone else—Nayuta has wished for this since she was a child. However, her greed was deemed sinful, seeing it as weakness and ugliness, and she is locked away in the depths of her heart. Then, an incident occurs that will shake her destiny. Will she run from her desires, or face them? When the Lip Monster regains its color, Nayuta will become stronger, more beautiful, and transform. This is the origin story of Kamen Rider Eins.