Having failed the Comet Blaster exams mysteriously, Mikaze and her friends are sent back to the Shimoji Island base, where, with three new Meteor Sweeper trainees around, they have been promoted to instructor positions. Meanwhile, more comets are on their way to Earth, and the mysteries behind the rift in the Cosmic Emergency Management Agency—as well as the alien parasites—begins to unravel.

During the night of July 12 in 1917, plenty of strange visions appeared, such as sun and moon shined together, waves and tides turned continually and so on. Dense clouds started darkening the sky, while buildings collapsed one after another in a sudden. In a while, the whole world fell into a crisis. Three grave-robbing aristocratic family, Zhang, Han, Cao, joint hands to solve this huge puzzle and save the world. Among them, the young master, Zhang Tianqi, who was kind and honest, with his team, had suffered from a lot of troubles in order to save the world in danger, and then finally figure out the Loulan Kingdom's secret. Loulan, with thousand years' secrets, had a grand and treacherous tomb, which almost dragged the team into death. So, what's the relationship between the mysterious visions and the Louland tomb? A story across millenniums is now beginning...

This is the OVA of The Galaxy Railways. The Galaxy Express 999 crashes on the off-limits planet of Herise and it's up to the SDF Sirius Platoon to assist.

The movie begins with Fuyuki Hinata and the Keroro Platoon exploring an abandoned temple in the mountaintop city of Machu Picchu in Peru. While on the exploration, Keroro accidentally sets off a trap, and by chance they find a hidden chamber with a large blue crystal in the center, on a stand that has a key in it. Keroro leans on the key, causing the room to activate a mysterious machine, this caused the entire temple to shake. As soon as the group realized what was happening, they run out of the room. While running, Keroro accidentally loses his Kero Ball while Fuyuki catches a fleeting glimpse of a glowing young woman as he is running out, and tells Keroro that there was a girl in the room, but he is forced to leave the room before he can say anything else. The group successfully escapes, while the girl (now sprouting a pair of glowing wings) watches them leave - while back in the chamber, something is growing within the crystal...