"7SEEDS" is a post-apocalyptic survival manga series written and illustrated by Yumi Tamura. The narrative is set in a future where humanity faces extinction due to a catastrophic meteor strike. In anticipation of this event, the Japanese government initiates the "7SEEDS Project," a plan to preserve humanity by cryogenically freezing groups of young individuals and awakening them after the disaster to rebuild civilization. These groups, known as "teams," are named after seasons and constellations: Team Spring, Team Summer A, Team Summer B, Team Autumn, and Team Winter.

The story begins with the awakening of Team Summer B, one of the five groups, in a drastically altered world. The team members, who were chosen for their unique skills and resilience, must navigate a hostile environment filled with mutated flora and fauna, extreme weather, and the remnants of a collapsed society. Each team member has a distinct personality and background, contributing to the group dynamics and survival strategies. Key characters include Natsu Iwashimizu, a shy and empathetic girl who becomes a moral compass for the group; Arashi Aota, a former delinquent with a strong sense of justice; and Semimaru Asai, a pragmatic and resourceful leader.

As the teams explore the new world, they encounter other groups and remnants of humanity, some cooperative and others hostile. The narrative alternates between the perspectives of different teams, revealing their struggles, alliances, and conflicts. Themes of trust, leadership, and the human will to survive are central to the story. The teams must also grapple with the ethical implications of the 7SEEDS Project, questioning the motives of those who created it and the sacrifices made for their survival.

The plot is driven by the teams' efforts to find safety, resources, and a sense of purpose in a world where the rules of civilization no longer apply. Along the way, they uncover clues about the fate of the original project leaders and the true extent of the disaster. The series combines elements of adventure, drama, and psychological tension, with a focus on character development and interpersonal relationships. The harsh realities of survival are depicted unflinchingly, emphasizing the physical and emotional toll on the characters.

"7SEEDS" is notable for its intricate world-building, complex characters, and exploration of human resilience in the face of overwhelming adversity. The narrative structure, which shifts between timelines and perspectives, adds depth to the story, revealing the interconnectedness of the teams' fates. The series concludes with a resolution that ties together the various threads of the plot, offering a poignant reflection on the enduring spirit of humanity.