Marginal Blue, Youbi no Kami-sama

is a Japanese light novel series written by Harumi Mizuochi, with illustrations by Koin. The series began publication on December 10, 2004 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
Rumors of "Sky" that any wish will come true. On the day marked on the calendar, a girl jumped out of the classroom window. Six months later, two girls entered high school, which has entered the new semester. Masato Sakagami becomes close to one of the girls, Aoi Kazami, in the wake of a traffic accident that he accidentally witnesses, and begins dating. However, as the next "Sky" approached, strange incidents began to occur around Masato ... What is "Awai" that spreads across the world !? And what is "Imaginary" that chases girls !?