そこは空の島。数千年前空へ浮かんだその島には大昔から人はいないとされている。しかし調査隊が見つけたのは比較的新しい遺物の存在。

Over there is a sky island. Thousands of years ago, the island floated towards the sky and there haven't been any humans on it for a long time. However, what the Investigation Corp found was the existence of a relatively new artifact.