Based on a children's picture book of the same name. A Christmas tale about a bird who was raised by tree after it was abandoned. The tree was then cut down for people in the city to use for Christmas celebrations. The bird desperately is trying to find its adoptive tree mother with the help of Jeremy, a penniless orphan, who heard her story so they go and search every tree being used in town. The search in the cold takes a toll on Jeremy until Santa Claus appears, but is it really him?

The series is centered on 27-year-old homeroom teacher Mika Suzuki (who only looks about half her age) and the eccentric and colorful students of her class.

A boy named Lasset who lives on a farm in the rural northern US makes a perilous trek through the wilderness to a sanctuary 300 miles to the north to save the life of a gray wolf that he had raised from a puppy after an incident in which the wolf kills the family dog.

Hiroshima, summer of 1945. A young girl named Nobuko saves a starving kitten from crows. She wants to keep the kitten, but her parents dismiss the idea. Nobuko eventually convinces them to let her keep it. She and her brother Makoto name the cat Kuro. Kuro quickly brings joy and laughter to the family. As World War II takes its toll on Japan, it becomes harder for Nobuko and her family to care for Kuro. One August morning, Kuro begins acting strangely...