After catching her first glimpse of Earth from the Azatos Empire's survey vessel, Chief Investigator Liza Luna intends to wipe out every lifeform on the planet right away, preserving only useful resources. During the planetary survey, Liza finds that human civilization has developed at a pitiful pace relative to other species. Liza travels to the planet's surface to thoroughly examine and comprehend its residents. Remaining convinced that nothing of value exists there, the investigator enters a cafe to assess the local food culture. Liza steps into a cat cafe, where she encounters creatures far cuter than anything else in the galaxy. Driven by this new finding, Liza resolves to investigate Earth's many adorable inhabitants.