Kamen Rider Ghost: Legendary! Rider Souls! S01 E01 Drive Chapter

A monster named Xibalba appears in the city. Then a boy named Frey appears and summons Heart Roidmude. The next day, Takeru and Makoto appear to the scene and encounter Frey and Heart Roidmude. Takeru and Makoto transform into Ghost and Specter respectively and take on Heart Roidmude.