I can't seem to find this light novel called ga-Rei: Kizashi in any format, it's by Katsuhiko Takayama and the original author is Hajime Segawa, don't know if it helps but is part of the Ga-rei Series.
It has only 1 volume and it was released in february 2020.
Even the raw in pdf or epub would be very helpful, thank you in advance!