Miki Yagata

In 2079, the world's first orbital elevator was built in the Pacific Ocean to commemorate the peace that mankind regained after the 3rd World War. However, during the completion ceremony, a huge red humanoid object appears from outer space. It was so powerful that mankind was defeated in vain resistance. The orbital elevator was occupied, and since then mankind has entered a war with the red hostile flying object "Vacant" flying from there. Summer 2099. "It's been 20 years since the war started." Humanity developed the humanoid 7th generation fighter "Seventh" and succeeded in suppressing "Vacant" to the vicinity of the orbital elevator.

Awakening from magical stasis after a thousand years, the Dark Lord Leonis suddenly finds himself in the body of a ten-year-old boy! He quickly meets Riselia, a girl confronting the Voids, creatures that have nearly exterminated humanity. Determined to uncover the mysteries of this strange new era, Leonis enrolls in Excalibur Academy, a school that trains students to fight back against these enigmatic monsters. Could the Voids hold some connection to Leonis's past?