Takatora shows Kouta the truth behind Helheim Forest, at the same time Kaito would learn the same thing from Ryoma, Sid, and Yoko. Meanwhile in Zawame City, more Inves invade and it's up to Mitsuzane and Zack to stop them.
- Cassandra Truth: #20 reveals that Takatora and the rest of Yggdrasil know about the impending doom of Earth. The justification subverts the usual expectation that they'd be unable to convince anyone of their story; instead, they think that telling the people about it would just cause mass hysteria.
- Wham Episode: The truth is revealed: Helheim actually invaded a civilization long ago and absorbed it into their own forest, turning the humans into Inves, with Earth turning into another Helheim within ten years. In addition, Sid, Ryoma, and Yoko are planning to use Helheim for their own needs and ask Kaito to join them. Not only that, we learn that, despite the Beat Riders swearing off using Inves, the citizens of Zawame still rely on their mob mentality and Oren's word. Worse still, Kouta and Kaito both react to this with disturbing results.
- Wham Shot: Kouta and the audience are shown the sight that horrified Micchy back in #16. It was the ruins of a city that had been conquered by the Inves, thus revealing that Helheim is an entire WORLD that the Inves had conquered. And Earth is next.
- Villain Episode: This episode is essentially Kouta and Kaito hanging out with the villains and having them take the main focus and role of exposit what happened and why Yggdrasil exists, with Zack, Oren, and Micchy having small parts.
