The sky is blue, infinitely high, and infinitely vast... Whose words were these again...? Ah, I remember... It was about a virtual reality Rudra told me about. A fairy tale. How many years has it been since humanity took refuge underground? No one alive has ever seen a blue sky. And now, I'm trapped in the depths, in a small, lifeless room. Just how long have I been here...? A young girl named Suria wakes up in a laboratory and finds out that she has been put in cryosleep for 1000 years without her knowledge. In order to search for the rest of humanity, she builds Labor with her trusty Buds, and sends them off to investigate...