In the opening six episodes of *Koisuru Asteroid*, we meet the enigmatic high‑school student Yūto Hoshino, who discovers a mysterious crystal that grants him the ability to see into a parallel world. While struggling with his newfound power, Yūto encounters Riko, an alien girl from the asteroid who has come to Earth in search of a legendary artifact. Their initial clash quickly turns into an uneasy alliance as they realize that the crystal is linked to a powerful entity known as the Asteroid King, who threatens both worlds with his insatiable hunger for energy.
As Yūto and Riko travel through a series of surreal landscapes—ranging from abandoned amusement parks to floating islands—they uncover clues about the crystal"s origin and the history of the asteroid. Along the way, Yūto is forced to confront his own fears and insecurities, gradually learning to trust Riko and harness the crystal"s power. Meanwhile, a shadowy organization begins to pursue them, intent on capturing the artifact for its own nefarious purposes.
By episode six, Yūto and Riko have forged a fragile bond, and the stakes are raised when the Asteroid King"s presence becomes undeniable. The duo must now decide whether to protect their worlds or let the crystal's power consume them, setting the stage for the conflict that will drive the rest of the series.
