March on Earth(2001)

Chikyuu Koushinkyoku

A young girl must grow up quickly in the face of tragedy and care for her nephew. After the death of Yuzu and Tsubaki's parents, Tsubaki became a single mother. But when she died in a fatal car accident, her younger sister Yuzu was left to care for the little boy by herself. With only the help of her friends and a kindly landlady, will she be able to meet thechallenge of raising a baby?

(Source: CMX)