Inazuma Eleven: Baku Gaidenshuu

Overview

The first volume features different stories about the original cast's training sessions and special techniques. It fills in gaps that were never explained before and offers a new point of view about some in-game scenes. The second volume recreates the world seen in the videogame "Inazuma Eleven Strikers" for Wii, from the point of view of Inazuma Japan. It features many characters from every season and situations only seen in said game.

Source: AniList