Karin wo Idaita Shoujo

is a light novel series by Nanasawa Matari with illustrations by Ryuukeichi Andromeda. It began as a web novel, but was later licensed and published by Enterbrain on 2015.

Plot
How long I’d been here, I couldn’t quite recall. From this sorry situation, I as always raised my eyes to the sky; a sky in which the great, massive sun was clad in levity. Sunlight poured gently upon all. What a blessing it would have been for the world if only the skies could remain clear. For tomorrow too, and for all days to come, I was to continue to pray for calm. To endure for those who cried, with desperation I remained in prayer.

And then, one freezing, forlorn, soulless, stagnant, drizzly day we died. Or so I thought…

Official

 * Web Novel (Japanese)

Other Sources

 * Light Novel:
 * Web Novel (English)