The year is 2067. Tactical Sound Unit Walküre performs their songs to quell Vár Syndrome, a strange disease that causes humans to go berserk. Meanwhile, the Aerial Knights, a variable fighter unit of Windermere Kingdom, take action. A story of teamwork and love that transcends star systems unfolds.
The year is 2067, half a century since humans entered the galaxy on immigrant ships. Vár Syndrome, a strange disease that causes humans to go berserk, is raging. A Tactical Sound Unit, Walküre, was formed as a countermeasure. They travel and perform songs to quell the symptoms of Vár. Freyja, a girl who wants to join Walküre, runs away from her home planet to audition. However, she gets caught up in a riot caused by a Vár outbreak, and is saved by Hayate, a boy she met on the way. Moved by Walküre’s battlefield show, Freyja sings along. Meanwhile, the Aerial Knights, a variable fighter unit from Freyja's hometown of the Kingdom of Windermere, make their move. The mysteries of the legacy of Protoculture intertwine, and a story of teamwork and love that transcends star systems unfolds.
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