20,000 years ago, on an unknown island, covered by endless white clouds, there was only one sun and one small face for the island. It was constantly moving, floating in the universe without stopping in one place, unaffected by any weather or phenomenon. Above the island was a beautiful dream-like island, beautiful and perfectly green. A god was gradually formed by that place, Yiezhou, the god of joy, feasting and victory. Under her protection and power, a modern civilization was created on the island. It was prosperous, developed, rich, like a dream that gods and humans could only hear about but not set foot on. It was called the Dreamy Cloud Island. The place where the only race living on it was created by Yiezhou, the Etellnialei, a race blessed with immortality, holding a god-slaying sword held by Yiezhou herself, created by her own hands.

She is outside the control of the God Wenger, so she can do whatever she wants and seems unstoppable. Today, the two demigods Oikawa and Iwaizumi, who are about to be promoted, received an important mission from the God Wenger himself. It is to retrieve the God-Slaying Sword from Yiezhou. And to get to that special island, they must go to Ohara Island, one of the islands that is also under her control. To get the special space train ticket to get to that island.