Kamen Rider Zero-One: S1 E51 - Their Respective Futures Kamen Rider Zero-One

The battle between Aruto and Horobi represents all-out war between humans and Humagears. Nevertheless, the conclusion Aruto chose is a direct confrontation with Horobi. Obtaining the power of the Ark, Horobi transforms in order to bring down Aruto. Wielding the same power of the Ark, Aruto goes to meet the enemy as Kamen Rider Ark-One….