"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, which involves cryogenically freezing groups of young individuals to ensure the survival of the human race. These groups, known as "teams," are awakened in the harsh, transformed world long after the disaster, tasked with adapting to the new environment and rebuilding civilization.

The story unfolds through the perspectives of multiple teams, each named after a season: Team Spring, Team Summer A, Team Summer B, Team Autumn, and Team Winter. Each team is composed of individuals with diverse skills and personalities, selected for their potential to contribute to humanity's survival. The teams are scattered across different regions of Japan, facing unique challenges and dangers in their respective environments.

Team Summer A, one of the central groups, includes Natsu Iwashimizu, a shy and insecure girl who struggles to adapt to the harsh realities of the new world. Her growth and resilience become a focal point as she learns to trust her teammates, including Arashi Aota, a confident and resourceful leader, and Semimaru Asai, a pragmatic and skilled survivalist. Team Summer B, led by the enigmatic Hana Sugurono, faces internal conflicts and external threats, highlighting the psychological toll of their situation.

Team Spring, consisting of individuals with specialized knowledge, such as botanist Ango Hoshikawa and engineer Botan Saotome, focuses on utilizing their expertise to survive and rebuild. Team Autumn, a group of athletes, relies on physical prowess and teamwork to navigate the treacherous landscape. Team Winter, the final group introduced, is composed of individuals with unique backgrounds, including a former criminal and a scientist, whose dynamics add complexity to the narrative.

As the teams struggle to survive, they encounter mutated flora and fauna, extreme weather conditions, and remnants of the old world that pose both opportunities and dangers. The story explores themes of human resilience, cooperation, and the ethical dilemmas of survival. Interpersonal relationships, trust, and leadership are tested as the characters confront their fears and past traumas.

Throughout the series, the teams gradually uncover the truth about the 7SEEDS project, including its origins, purpose, and the fate of those who initiated it. Flashbacks and fragmented memories provide insight into the characters' lives before the apocalypse, adding depth to their motivations and actions. The narrative weaves together the teams' individual journeys, culminating in their eventual convergence and the realization of their shared mission to ensure humanity's future.

"7SEEDS" combines elements of science fiction, adventure, and drama, presenting a gripping tale of survival and human endurance in a world forever changed by catastrophe. The series' intricate plot, well-developed characters, and exploration of moral and existential questions make it a compelling addition to the post-apocalyptic genre.