1,000 years in the future, humans have discovered a way to space travel more efficiently, and they can now go to different galaxies. "Spaceflights" allow humans to travel from galaxy to galaxy, just as you can use airplanes to go to another country or to go on a cruise for leisure. An upcoming luxury spaceship is launching soon, and an aspiring spaceflight attendant named Cassiopeia ("Cassi"), a young woman from Earth, has been given the opportunity to work on the heavily anticipated spaceship: The Meteorite. On the trip, she meets the pilot of the spaceship, who was also her idol--Celeste--who appears to have taken an unexpected liking to the new attendant.