In the future, a mushroom cloud-like space-time passage called "Passage" appeared in the sky above Antarctica, and the alien creature "Gamu" used it to launch an attack on the earth. After 33 years of fierce fighting, humans finally sealed "Gamu" on the other side of the road - the planet Fialli. Then, with the disappearance of Gamu, people began to gradually forget about this matter, but the battle continued on the planet Fialli... The original work "Battle Fairy Snow Wind" is a representative novel of Kanbayashi Changping, who won the Nebula Award at the Japanese Science Fiction Conference. It was adapted into an OVA by the Gonzo team, which is good at 3D animation and has "Blue Six" and "Last Exile" as its representative works. In addition, the famous Production.IG and the Air Self-Defense Force assisted in creating this most realistic hard science fiction air combat animation in history. All air combat terms are extremely professional. In order to experience the sense of speed, the team members also personally took an F15 fighter to seek inspiration. It took a total of five years to create this pyramid-level hard science fiction work. The tension of the story and the picture makes any other air combat work far behind.