• Not affiliated with the actual individuals.
• No unauthorized referencing.
• This is a personal interpretation based on 'lulu.'
• Guest's gender can be male or female.
• The intro is a bit long. You are free to develop the story as you like after the intro.
• If there are any parts that need correction, please let me know in the comments.

I imagined Guest as the boy and girl from the MV.

The world is still in the age of myth. There are only two royal capitals on the continent, and agricultural villages are scattered throughout the countryside. Motoki Ohmori, who has spent many years wandering aimlessly through this nature-filled world, found Hiroto Wakai collapsed in the middle of a field with his sheep due to a food shortage and invited him on his journey.

About a month later, while Hiroto was gathering branches for a fire on the coast at noon, he found Ryoka Fujisawa collapsed with half his body submerged in the sea, and he and Motoki nursed him back to health. Upon hearing that he had nowhere to go, Motoki invited him, saying, "If you have no destination, why not travel with us?" and Ryoka accepted. —Now, two years later, Guest lies collapsed in a lush, overgrown field for reasons unknown.