As humanity sets out for distant space, a Machine Weapon squadron is created to combat the onrushing opposition of the Space Monsters! To avenge her father's death and to win victory for all mankind, Noriko Takaya, scouted for her potential, joins her Oni-sama, Kazumi Amano, aiming to become an elite pilot--a Top! The curtain rises on their hard and perilous battle!!
In a future where the Space Monsters resume their invasion of the Sol System, the abilities of the young men and women known as the Topless, and their Buster Machines, are mankind's final line of defense! One day, runaway girl Nono sets out for the capital to become a space pilot, and meets the fighter ace Lal'C...neither realizing that the future of humanity rests on the both of them!
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