Kero-chan to Mokona

Shortly after arriving on a new world Syaoran and the gang go to sleep for the night. When they wake up they end up with a small problem. Everyone except Mokona is only an inch tall. When they are almost stepped on by Mokona, Kero, the guardian deity of the world saves them. Kero explains that a while back a feather fell from the sky and landed on a mountain nearby and that this feather makes all humans in the world tiny.