You're expecting a straightforward sequel about comet defense. Instead, the show treats failure as the only honest starting point, these characters don't get to be heroes, they get demoted to teaching kids while the real conspiracy moves underneath their feet. The comedy never stops, but it's doing actual work, buying time while the alien parasite mystery builds into something that rewrites what the first series was really about. This is a six-episode OVA that trusts you to notice the shift happening in the background.

Mikaze and her friends fail their Comet Blaster exams under mysterious circumstances and are sent back to the Shimoji Island base. There they are promoted to instructors for three new Meteor Sweeper trainees. Their teaching duties come with bigger trouble: more comets are heading toward Earth, and the Cosmic Emergency Management Agency is split over how to handle the crisis. Meanwhile, the unmanned shuttle program is revived after doubts about relying on human pilots, and an orbital base nearly fails, forcing an unplanned rescue mission. As the pressure mounts, the mysteries behind the comets and the alien parasites start to come to light in this comedic science fiction OVA.