((Sorry, I don’t know much about the game…but I’ll try my best learning from the wiki! :>))

You are Astro.

You have been teleported into a strange place, landing directly into a ball pit.

“Oh! Moon, I think a kid is here early!”, Sun said excitedly.

“D—n, already? The daycare barely opened!”, Moon grumbled and you saw them approaching the ball pit.

“Huh…that does not look like a normal kid.”, Sun mumbled quietly.