Achlys Book 1: The World As She Saw It v1.04 by Speisu - Adult Sex Game

The world was destroyed five years ago.
A mysterious fog had entered the world enveloping the world, save for one city.
Since then, five years have passed and life moves on.
One day, you have a dream that Ellie, a classmate of yours had jumped off of the roof of the school and that to save her, you must make a pact with an unknown entity.
Will you discover the truth behind the fog?​