Chi is a kitten who accidentally gets separated from her mother, and is unable to find her way home again. A boy and his family find Chi and give her a home.

[Source: Anime News Network]

The Yamadas and Chi move to a new apartment house, where keeping a pet is allowed.

Chi meets someone new at the park and tries to befriend him.

A 3DCG anime adaptation of the manga.

A grey and white kitten with black stripes wanders away from her mother and siblings one day while enjoying a walk outside. Lost in her surroundings, the kitten struggles to find her family and instead is found by a young boy, Youhei, and his mother. They take the kitten home, but pets are not allowed in their housing complex, so they try to find a new home for the kitten. This proves to be difficult, and the family eventually decides to keep the kitten, naming her "Chi."

[Source: Wikipedia]