Seitarou Yaoi operates as a space smuggler piloting the cargo vessel *Iron Goblin*, living a solitary existence hauling illicit goods like pornography and adult toys to the solar system's remote outposts. His routine involves minimal companionship, chiefly from a lecherous robot called Chiraku. This isolation shatters when Eterna, Earth's central supercomputer, cripples all registered spacecraft propulsion systems.

Because the *Iron Goblin* lacks official registration, it remains functional during the crisis. Seitarou answers a distress call, rescuing three stranded students from Lunar Ferris Academy on the Moon: Mayfa, Jojo, and Lyla. He soon learns of their pivotal family ties: Mayfa is the daughter of Eterna's designer, Jojo the daughter of a major aerospace corporation's CEO, and Lyla the daughter of Earth's president.

This rescue thrusts Seitarou into an unforeseen command position. He, the three students, Chiraku, an alien lizard, and a winged star cat must now traverse the void to Earth and confront Eterna to halt human extinction. The journey demands he transform from a lone smuggler into a leader coordinating a disparate team with varied skills and backgrounds for this vital mission.