Escape Speed

is a Japanese light novel series written by Nozomu Kuoka, with illustrations by Gin. The series began publication on February 10, 2012 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
Showa 1 ○ Summer of 1st year. The island nation of the Far East, Yashima, was devastated by the war 20 years ago.

In the abandoned town of Jinten, people lived under the threat of runaway combat machines. While escaping from combat weapons, the girl Kanaha meets a strange boy sleeping in a casket and a giant "bee" and asks her to help her. That was the moment when the girl and the boy signed a "master-slave contract". The boy's name is Navagraha, a wing. "Bee" and the boy were ultra-high-performance strategic weapons called "Kichu".

Kanoha treats Navagraha, who has no human emotions because it is a weapon, as a human being and interacts with him. It was Navagraha, which gradually began to have a heart, but the same demon insect as Navagraha, the dragonfly of the four heavens, came flying ── !?