In the far future, humanity expanded into space and prospered. But a sudden Jikushin—an earthquake of time and space—severed all networks, and every civilization was reset. In time, the human race began to revive and entered a second age of prosperity under the Transvaal imperial country, which rose at the center of the galaxy. The science and technology that existed before the reset, known as "Lost Technology," was considered the work of the gods, and it came to be worshipped by a priest called "Tsuki no miko."
Meanwhile, a certain guard fleet was stationed on the frontier of the galaxy. Though it seemed like a perfectly ordinary army, it contained a team made up only of women: the "Angel Corps." They controlled a spaceship called the "Angel Frame," a relic of Lost Technology, and used it to collect lost technology and carry out the duty of managing it. They were not elite pilots; rather, the Angel Corps was a group of eccentrics. There was Forte, an arms maniac; Mint, a costume player; Vanilla, who was taciturn; Ranpha, who was showy; and Milfeulle, who liked cooking. Every time, they caused big trouble on their missions.
