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Tsubasa Shiina is a 10-year-old girl who recently moved to Hokkaido
to live with her father. In school, she is very quiet and unsociable
with her classmates. Then one night, she witnesses a UFO crash in
the forest near her home. She rushes to the scene and finds the
pilot, codenamed "D.D.", in a barely stable condition.
Also in the scene is a Maguar, a hideous alien that hatched aboard
D.D.'s ship. As the Maguar is close to taking Tsubasa's life, an
alien lifeform known as a "Ribers" fuses with her body
to form the mysterious battle armor, Figure 17, which shortly destroys
the alien threat. The Ribers takes the name Hikaru and turns into
an identical copy of Tsubasa.
As time passes, Tsubasa becomes more open to everyone around her,
thanks to her new twin sister Hikaru. However, with Maguar eggs
scattered all over Hokkaido, their ability to form Figure 17 is
needed to keep the alien threat in check until help from D.D.'s
home planet arrives. |