Santa Company: Christmas no Himitsu (Santa Company: The Secret of Christmas)
Extended theatrical version of "Santa Company."
Noel is an 11-year-old girl who despises Christmas. She has lived with her father ever since her parents divorced three years ago, but her father ends up busy at work every Christmas and she cannot play with her friends from school.
On a lonely Christmas Eve, Noel takes her usual apartment complex elevator ride to her home, but when the doors open, she finds herself lost in a humongous factory—owned by Santa Claus. Santa Claus has gone corporate as Santa Company with the motto "Swiftly, surely, secretly." The outfit takes orders and delivers top-notch presents to children in the utmost secrecy. Noel meets some new friends, and together, they take off in a sled to deliver presents.
[Source: Anime News Network]