Part 1: The Green Blade Descends

In a world where vampires reign and humanity teeters on the edge of extinction, a new warrior arrives - cloaked in green armor, a sword forged from resolve and nature itself. Kamen Rider Tycoon, in his Bujin Sword Form, is pulled into the post-apocalyptic Earth of Owari no Seraph through a dimensional rift. But his arrival doesn't go unnoticed. The Hyakuya squad is wary. Mikaela senses something unnatural. And Krul Tepes wants the Rider's power for herself.