"Konoyo no Owari e no Tabi" is a manga series set in a post-apocalyptic world where humanity faces extinction due to a mysterious phenomenon known as the "Collapse." The story centers on a young man named Shuu, who possesses a unique ability to manipulate time. Shuu is accompanied by a girl named Nene, who is immune to the Collapse and holds the key to humanity's survival. Together, they embark on a perilous journey to uncover the truth behind the Collapse and find a way to reverse its effects.

The narrative unfolds in a desolate landscape where remnants of civilization are scattered, and survivors struggle to endure. Shuu and Nene encounter various factions, each with their own agendas, ranging from those seeking to exploit the Collapse for power to others desperate to preserve what remains of humanity. The duo faces constant threats from mutated creatures and hostile groups, forcing them to rely on Shuu's time-manipulation abilities and Nene's resilience.

As the story progresses, Shuu and Nene uncover fragments of the past that reveal the origins of the Collapse. These revelations suggest that the phenomenon may have been triggered by human experimentation and technological advancements gone awry. The pair also learns of a potential solution hidden in a distant, heavily guarded location known as the "End Point." Their journey to this destination becomes a race against time, as the Collapse continues to spread, threatening to consume the world entirely.

The characters are driven by their personal motivations and evolving relationships. Shuu's internal conflict stems from his guilt over past failures and his determination to protect Nene, while Nene grapples with her role as the potential savior of humanity and her growing bond with Shuu. Supporting characters, such as rogue scientists, mercenaries, and other survivors, add depth to the narrative, each contributing to the overarching themes of survival, sacrifice, and hope.

The manga explores the consequences of humanity's hubris and the resilience of the human spirit in the face of overwhelming adversity. Through its intricate plot and character dynamics, "Konoyo no Owari e no Tabi" presents a compelling tale of survival and redemption in a world on the brink of annihilation.