This article is set in a world where the characters of VG and BF coexist. VG is the main line world, and buddyfight is just a simple TCG game in this world. (What happens in the animation is BF Public Studio Acting)
Tsukuba is the son of Chu and Aichi. Noboru is the son of Miwa and Misaki.
In this article, Tsubasa is set to be in the same grade as Kibaou and others [but on the set (in the main film), he is one grade higher], and Kibaou and others are all in the first grade of junior high school in real life.
Tsubasa, Noboru and Akane are studying in Miyaji (first year of junior high school), Kibaou, Tetsuya and Baku are studying in Houe (first year of junior high school), and Langya and Tong are studying in Fukuhara (third and first year of junior high school).