Itsudatte My Santa!

Itsudatte My Santa! (いつだってMyサンタ!, lit. "Always My Santa!") is a one-shot chapter by Ken Akamatsu before his serialization of Love Hina. It ran in Shōnen Magazine in 1998, and was serialized in volumes 4 and 5. A 2-episode anime OVA was released on December 7, 2005 in Japan. The anime OVA was licensed in the United States by FUNimation.

Plot
In the story, a girl called Mai appears before a boy who happens to hate Christmas. As it turns out he was born on December 24 and thus was named Santa, causing him to hate the holiday. Moreover, as a child, he never had any festive occasions, such as birthday parties. With the power of Christmas, Mai is given the mission to improve his luck and change his views for the better.