Chii Wishes Upon a Star.
Since the bamboo tree is ruined, the Yamadas use a Christmas tree instead, and Youhei makes a wish.
Aired 07/07/2009EP 58 - Chii Wishes Upon a Star.

2009
Chi's Sweet Home - Chi's New Address
Chi is still living with the Yamada family, but they decide it isn't fair to force her to hide indoors in their "no pets allowed" apartment. So they decide there is only one thing to be done, Chi must move away for her own happiness.