Drops of One Wing - Manhwa

In the year 3015, 90% of the planet is enveloped by the vast ocean and flying is a commonplace activity among humans. Those who lack this ability, known as "Drops" (the older generation), include Tsubasa. She resides in a world where staircases and ladders are nearly obsolete, as the gap between floors and buildings continues to expand in height and distance.

This is the physical copy of the Drops of One Wing manhwa.