Because of the difficulty of finding coherent description for Di Gi Charat series, Here is the story for the first two episodes of Di Gi Charat Nyo:

Episode 1:
Dejiko (Digi Charat), Puchiko (Petit Charat), and Gema head for Earth in their cat-shaped UFO. They came from Planet Digi Charat for Dejiko`s princess training. When they thought they could finally see Earth, their UFO suddenly started to shake. To make matters worse, the violent shaking caused part of the ship to explode!! Because of the explosion, only Puchiko was blown outside. And the UFO, with Dejiko and Gema in it, plummeted to the earth, spewing smoke the whole way...

Episode 2:
Dejiko and company are in a UFO that is plummeting to Earth because it`s out of gas. What`s more, because of an explosion, only Puchiko was thrown outside the UFO! The UFO somehow pulls off an emergency landing on Earth. While looking for Puchiko in the shopping district, Dejiko and Gema meet siblings from a toy store. Meanwhile, Puchiko was also in the shopping district, looking for Dejiko and Gema. Attracted by a nice, sweet smell, Puchiko gets in line at a soft-senbei shop. After that, Puchiko finds Gema and does her best to follow, but then loses sight of her. There was a suspicious shadow watching Puchiko. Will Puchiko really be able to reunite with Dejiko and Gema?