"Mobile Fighter G Gundam: Edge of Gunsmoke" is a manga adaptation of the popular "Mobile Fighter G Gundam" anime series, expanding on its universe with a self-contained narrative. The story is set in the Future Century, where nations resolve conflicts through a martial arts tournament known as the Gundam Fight. Each country sends a representative piloting a unique Gundam to compete for supremacy, with the winner granting their nation control over the Earth Sphere.

The protagonist, Domon Kasshu, is the representative of Neo Japan, piloting the Shining Gundam. Domon is driven by a personal mission to locate his older brother, Kyoji Kasshu, who has been accused of stealing the Devil Gundam, a highly dangerous and autonomous weapon. The Devil Gundam possesses the ability to self-evolve and assimilate other machines, posing a significant threat to humanity. Domon’s quest intertwines with the Gundam Fight, as he battles rival pilots while uncovering the truth about his brother and the Devil Gundam.

Throughout the story, Domon encounters a diverse cast of characters, each representing their respective nations and ideologies. Notable figures include Rain Mikamura, Domon’s childhood friend and mechanic, who provides emotional support and technical expertise. Allenby Beardsley, the pilot of the Nobel Gundam, becomes both a rival and an ally, showcasing the complexities of relationships in the high-stakes tournament. Other competitors, such as Chibodee Crocket (Neo America), George de Sand (Neo France), and Sai Saici (Neo China), add depth to the narrative, each with their own motivations and backstories.

The manga delves into themes of loyalty, sacrifice, and the consequences of unchecked technological advancement. As Domon progresses through the Gundam Fight, he uncovers the true nature of the Devil Gundam and its connection to his family. The story builds toward a climactic confrontation, where Domon must confront his brother and the existential threat posed by the Devil Gundam. The resolution ties together the personal and global stakes, emphasizing the importance of unity and human resilience in the face of overwhelming odds.

"Edge of Gunsmoke" retains the core elements of the "G Gundam" franchise, blending intense mecha battles with character-driven drama. The manga expands on the anime’s lore, offering additional insights into the Gundam Fight and its participants. While it follows a familiar trajectory, the narrative distinguishes itself through its focus on Domon’s personal journey and the moral dilemmas surrounding the use of advanced technology. The result is a compelling addition to the "G Gundam" universe, appealing to both longtime fans and newcomers.