Meteor Shower Forecast: Rain with Occasional Shooting Stars.One day, while visiting her school's observatory in preparation for a meteor shower, a girl named Subaru comes across a mysterious greenhouse where she meets a frail boy. After leaving the room, finding it revert to the observatory before her eyes, Subaru encounters a small alien-like creature and follows it to a magically sealed classroom, where she comes across a group of girls in witch outfits, including her childhood friend Aoi. The girls and the creature, revealed to be a Pleiadian and the girls' president, notice potential in Subaru and give her a special broom, which brings her up through the clouds to a star-shaped gem that transforms her into a witch herself. The girls soon come under attack by a fragment of the Pleiadian's spaceship engine, which they attempt to capture but are suddenly thrown off when Subaru and Aoi argue with each other over their pasts. Encouraged by Subaru's positive attitude, the girls make a second attempt to capture the fragment, managing to shrink it down to size, but suddenly come under attack by a mysterious cloaked figure, who steals the fragment for himself. Luckily, Subaru manages to hide the real fragment under her hat and gets to see a meteor shower up close.