Kamen Rider Birthright: Halloween Special

Months have passed since Kamen Rider Birthright defeated the Over Quartzer along with his Titan Guardian Athar. Now Percy decides to travel back to America along with his girlfriend Ryuko and her friends to celebrate Halloween. Unbeknownst to them, an evil overlord was awakened, and is ready to take over Salem, Massachusetts. Can our hero and his friends stop this Halloween Threat.