"Mujin Wakusei Survive" is a science fiction anime series that revolves around a group of children who find themselves stranded on a mysterious, uninhabited planet after their spaceship crashes. The story begins with seven students from the Ciel Academy boarding a shuttle for a routine school trip. However, a sudden meteor shower damages their vessel, forcing an emergency landing on an unknown planet. The group consists of six children—Luna, Sharla, Howard, Menori, Bell, and Chako—along with their robotic caretaker, Adam. Each character brings distinct skills and personalities to the group, which becomes crucial for their survival.

The planet is a harsh and unpredictable environment, filled with dangerous creatures, extreme weather, and remnants of an ancient civilization. As the children struggle to adapt, they must rely on teamwork, ingenuity, and the limited resources available to them. Luna, the protagonist, emerges as a natural leader, displaying resilience and optimism despite the dire circumstances. Sharla, a resourceful and practical girl, often takes charge of problem-solving, while Howard, a tech-savvy boy, works to repair their equipment. Menori, the group's intellectual, provides critical insights into the planet's mysteries, and Bell, the youngest, brings a sense of innocence and hope. Chako, a timid but kind-hearted boy, gradually grows more confident as the story progresses. Adam, the robot, serves as both a protector and a source of information, though his limited functionality poses challenges.

As the group explores the planet, they uncover clues about its history, including the existence of advanced technology and the fate of its previous inhabitants. These discoveries hint at a larger narrative involving the planet's past and its connection to humanity. The children face numerous obstacles, from hostile wildlife to internal conflicts, as they work toward finding a way to return home. Their journey is marked by moments of tension, camaraderie, and personal growth, as each character confronts their fears and learns to trust one another.

The series balances survival challenges with themes of friendship, perseverance, and the resilience of the human spirit. The narrative unfolds gradually, with each episode revealing new aspects of the planet and the characters' evolving dynamics. The children's determination to survive and their unwavering hope for rescue drive the story forward, culminating in a resolution that ties together the mysteries of the planet and their own journey of self-discovery.