Miina Misasa, a 14-year-old social media influencer dubbed a Space Tuber, relentlessly pursues her goal of amassing 100 million followers. Though privately averse to space environments, she voyages to the Anshin station solely to expand her online audience, meticulously curating an idol-like persona through constant livestreams and polished posts. Her signature companion is Selfie, a bubblegum-pink heart-shaped drone engineered for seamless streaming, which she depends on to maintain her digital empire. When the station’s connection to Earth abruptly fails, her carefully crafted cheerfulness fractures, exposing unchecked panic.

Her younger brother, Hiroshi Tanegashima—their differing surnames a legacy of their parents’ divorce—accompanies her, though their dynamic remains overshadowed by her obsession with fame. As chaos erupts aboard Anshin, her ongoing broadcasts unintentionally chronicle the crew’s desperate struggle to survive. These raw, unscripted streams—initially meant for clout—capture critical events that ignite global fascination with space colonization. Analysts later credit her footage as a catalyst, predicting mass off-world migration within five decades.

Miina’s journey subtly shifts from calculated self-promotion to unwittingly shaping humanity’s future, her crisis-driven content evolving into a visceral rallying cry for interstellar expansion. The transformation occurs without conscious intent, her priorities eclipsed by survival, yet her influence endures far beyond her screen.