超时空要塞Δ

In the year 2067, at the galactic frontier where a mysterious illness causing humans to lose their sanity and turn violent—the "Var Syndrome"—is spreading. Formed as a countermeasure, the tactical sound unit "Walküre" travels across planets, holding live concerts to quell the "Var Syndrome" through their songs. Meanwhile, the Valkyrie unit of the "Windermere Kingdom," known as the "Aerial Knights," also begins to move—. Amidst the mysteries surrounding ancient heritage, a passionate tale of cross-galactic teamwork and romance unfolds.