"Sleepin' Planet" is a science fiction manga that explores themes of survival, human connection, and the consequences of technological advancement. The story is set in a distant future where humanity has colonized a planet called Eden, a seemingly idyllic world where people live in harmony with nature. However, this peace is maintained through a system called the "Sleepin' Program," which induces a state of hibernation in the population to conserve resources and prevent overpopulation. Citizens are periodically awakened to fulfill specific roles before returning to hibernation, ensuring the planet's delicate balance.

The protagonist, Aoi, is a young woman who awakens from hibernation to find herself in a world that feels increasingly unfamiliar. As she navigates her duties, she begins to notice inconsistencies in the system and the behavior of those around her. Aoi's curiosity leads her to uncover hidden truths about Eden's history and the true purpose of the Sleepin' Program. Along the way, she forms alliances with other awakened individuals, including Kaito, a resourceful engineer, and Sora, a mysterious figure with knowledge of the planet's secrets. Together, they unravel a conspiracy that threatens the very fabric of their society.

The narrative delves into the ethical dilemmas of controlling population growth and the sacrifices made for the greater good. As Aoi and her companions dig deeper, they encounter resistance from the governing body, known as the Eden Council, which seeks to maintain control over the population at any cost. The story builds tension as the characters grapple with questions of free will, identity, and the morality of their world's systems. The manga balances its philosophical undertones with moments of action and suspense, creating a compelling exploration of humanity's relationship with technology and the environment.