Fists fly when Oya High’s street fighters defend themselves from a three-school alliance of brawlers.

A special preview special released a few weeks before Kamen Rider Gavv's premiere, which revealed new details and unreleased footage featuring the next Kamen Rider, Kamen Rider Gavv.

Sahoko, an unremarkable high school girl, despises good-looking boys and has sworn off love after experiencing deep emotional pain. But her life takes an unexpected turn when she meets Kouta, a gorgeous pop star. As she gets to know his passion for his fans and his kindness, she realizes that he is different from the boys who have hurt her. Despite her strong resolve, she finds herself falling for him. However, Sahoko learns that Kouta, too, has made a firm decision in his heart to avoid special bond due to his own painful past.

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?!