Why a Harem You May be asking yourself

and here we are:

Alpha:Hiden Aurora/Kamen Rider Zero One

Yua Yaiba/Kamen Rider Valkyrie

Fuwako Isamu/Kamen rider Vulcan

Jin/Kamen Rider Jin

Horobi/Kamen Rider Horobi

Gaika Amatsu/Kamen Rider Thouser

Ark/Kamen Rider Ark