The first in an episodic JRPG about a technologically advanced civilization reduced to live underground following a spontaneous disaster of apocalyptic proportions. Thousands of years later, life above ground has been forgotten and the word ‘sky’ has lost all meaning.
A young boy, called Haru, awakens one day having dreamt of green plains and a blue void and embarks on an adventure with his friend, Kuroko, as they travel through the subterranean levels of their dystopian society to learn more about the world above.