Kamen Rider Gavv

Shoma, who comes from a different world, is saved by a boy named Hajime when he collapses from hunger. Shoma excitedly eats the snacks that Hajime gave him, but as soon as he does, Gochizo are born one after another. Meanwhile, freelance writer Hanto is gathering information on the appearance of "monsters" while doing research. Hajime hides Shoma in his secret base and hurries home when a mysterious man appears before him. The man transforms into the monster Granute and approaches Hajime. Shoma tries to save Hajime, but he is no match for the Granute. Gochizo suddenly appear in front of the suffering Shoma. Shoma sets and eats the Gochizo! He transforms into Kamen Rider Gavv and confronts the Granute!

Shoma, who has collapsed from hunger again, is helped by Sachika, who runs an anything and everything general store, and treats him to lunch and snacks. Hanto, while working on a case story, discovers information about Gavv on a social networking service. He starts interviewing witnesses. Shoma is asked by Sachika's friend Ritsu to assist her in her "anything goes" job. That night, Shoma is led out by a Gochizo, who suddenly appears, and runs into a man dressed in a jogging outfit. The man transforms into a Granute, and Shoma transforms into Gavv, and they clash!

By chance, Shoma meets a tough-looking man named Sujimoto and decides to help him with his work as he is asked. Then Sujimoto is attacked by a Granute. Shoma receives a call from the Gochizo and rushes to the scene, where he transforms into Gavv and challenges the Granute to a fight. The Kamen Rider appears! Hanto receives the news from Sachika and witnesses Gavv's battle...!?

Shoma mistakes the vegetables in the field for wildflowers and is caught by the owners of the field, Ryoji and his wife Mutsuko. After the misunderstanding is cleared up, Shoma is welcomed kindly by the couple. Hanto visits Granute researcher Suga and begins researching the Granutes. When Hanto is told about the true nature of Granutes, who kidnap humans to spice up sweets, he...!? An agent appears in front of Shoma, who is spending time with an elderly couple. Shoma escapes and confronts the agent, but then an unexpected person appears...!