Senkou Shoujo: Na mo Naki Hikari no Airi

is a Japanese light novel series written by Hajime Nakamura, with illustrations by Chiko. The series began publication on May 9, 2015 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
"... I'm looking for a loved one."

Kouki, who left his parents and worked hard to train his sword under his uncle, met a naive, wild, but noble girl, Airi. ..

In a world where electricity has become so valuable due to extreme weather and the Great Depression, Airi has the power to produce "light," but it has been at the mercy of a strange fate.

That fate is also intertwined with Kouki's hidden purpose. The encounter between the two heralds the beginning of a new adventure!