With dreams of diving abroad, Tsuneo gets a job assisting Josee, an artist whose imagination takes her far beyond her wheelchair. But when the tide turns against them, they push each other to places they never thought possible, and inspire a love fit for a storybook.

In order to defeat the Granute, Shoma will use new Gochizo to transform into a new form and assist! These new Gochizo are the Kungfu Ramen Gochizo and the Choco Treasure Gochizo.

Ever since coming across the world of boy’s rhythmic gymnastics during the last summer of junior-high, Shotaro Futaba has become fascinated with the sport. So when he enters Soshokuan Private High School, known as Ao High for short, he heads to the boy’s rhythmic gymnastics club, where he meets unique seniors and the ace of the team, Ryoya Misato. The members of the club each have their own passions, but they’ve put it all on the line with a single goal in mind. Now the next stage in their journey has arrived: the inter-high competition!

After being pulled through a door, Shoma finds himself in a peaceful world where Dark Treats do not exist?! In this world, Hapipare still exist, but a young man named Taorin who has Gavv works there. Taorin has no memory of his past, and Shoma decides to help him recover his memories. Meanwhile, a man named Caries begins indiscriminately attacking the town, and the peaceful world is transformed! The two struggle to restore peace and arrive at a huge Candy House. The two are on the verge of grasping something, but Caries transforms with an unknown Gochizo and corners Shoma and the others! What is the soruce of the overwhelming power that this most terrifying enemy has obtained?! What are Taorin's lost memories?!

After the events of the series, Shoma continues his research for "Light Treats" to replace Dark Treats, Hanto continues his research as a freelance writer as keep daily records of the battle of the Kamen Riders, and Rakia remains alone in the Granute World. However, a new incident occurs in the once peaceful human world, forcing Shoma to rush back to the battlefield. What serious abnormality has occured to Hanto's body? What is the current state of the president's daughter, Lizel Jaldak, who is stuck in the human world? The final battle of the candy Kamen Riders begin!

Granute, secret lifeforms, kidnap humans for "Dark Market Snacks." Shoma, from another world, transforms with Gochizo, a sweet-eating monster, into Kamen Rider Gavv via a mouth-like belt to stop Granute's attacks and save people.

This Kamen Rider Gavv spin-off depicts a "what if" scenario in the series. What if Granute Rage9/Kamen Rider Vram took a different route compared to what actually happened in the show?

Gochizo Morning Assembly is a short special, released alongside Kamen Rider Gavv: Guilty Parfait.