In the story, the seasons have changed and it will soon be the second spring. Tatsuya and Miyuki have finished their first year at First Magic High School and are on their spring break. The two go to their villa on the Ogasawara Island archipelago. After only a small moment of peace a lone young woman named Kokoa appears before them. She has abandoned the Naval base and she tells Tatsuya her one wish.

The class arrives in another world and they encounter a desolate environment dominated by a rampaging magical automaton.

The time is UC 1926. The Imperial Army's 203rd Air Mage Battalion led by Major Tanya Degurechaff has won the battle to the south against the Republic's stragglers. They expected to be given a vacation after returning victorious, but instead receive special orders from Staff HQ as soon as they get home. They are told that there were signs of a large-scale deployment near the Empire-Federation border. Faced with the prospect of a new major enemy, the desperate Empire fans the flame of war. Meanwhile, an international volunteer army spearheaded by the Commonwealth set foot in Federation territory. As they say, the enemy of an enemy is your friend. They suffer through misfortune purely out of national interest, and among them is a young girl. She is Warrant Officer Mary Sue, and she takes up arms hoping to bring the Empire, who killed her father, to justice.

One day, a mysterious creature suddenly appeared from within Lala's gummy case! Their name was... UMA, I think? Ah, don't be scared, everything will be okay! Nice to meet you, UMA! Twincool~☆ And just like a shooting star, we were whisked away to a faraway place!? Is this UMA's powers ~lun? What sort of creature are they ~lun? Because they can't communicate through words, it seems UMA really likes "The Shooting Star Song" ~lun♪ It's nice getting along with each other through music ~lun♪ But one day, a mysterious alien hunter appeared...oh no! Is it possible that they're after UMA ~lun!? If that's the case, then the universe and Earth are in danger! Let's all protect UMA together! Be sure to support us as we sing "The Shooting Star Song" which connects us with UMA!!

A gifted runner trains a determined but unskilled classmate, unaware he's creating a rival who will challenge him on the track for years to come.