"After War Gundam X: Under the Moonlight" is a manga sequel to the anime series "After War Gundam X," set in a post-apocalyptic world following the devastating Seventh Space War. The story takes place several years after the events of the anime, focusing on new characters while maintaining ties to the original narrative. The Earth is still recovering from the war, with humanity struggling to rebuild amidst the remnants of advanced mobile suit technology and the lingering effects of the conflict.

The protagonist, Jamil Neate, a former Newtype and leader of the Vulture ship Freeden, now works to preserve peace and prevent the resurgence of war. His efforts are complicated by the emergence of new factions and the rediscovery of powerful Gundam units. Central to the story is the Gundam X Divider, a mobile suit piloted by a young man named Shagia Frost, who seeks to harness its power for his own ambitions. Shagia, along with his brother Olba, becomes entangled in a conflict that threatens to reignite the destructive cycle of war.

The narrative explores themes of survival, the consequences of war, and the ethical dilemmas surrounding Newtypes—individuals with heightened psychic abilities. As Jamil and his allies confront Shagia and other adversaries, the story delves into the moral complexities of using advanced technology and the responsibilities of those who wield it. The manga expands on the lore of the "After War" timeline, introducing new mobile suits and factions while revisiting familiar elements from the anime.

The characters are driven by their personal motivations and struggles, with Jamil serving as a moral anchor amidst the chaos. Shagia’s ambition and desire for power contrast with Jamil’s commitment to peace, creating a dynamic tension that propels the story forward. The manga maintains a balance between action-packed mobile suit battles and introspective moments, reflecting on the human cost of war and the hope for a better future.