Surpr~se: Santa Claus is an Alien!?

Synopsis

Today is Christmas Eve. While Hikaru and her friends are enjoying their party, word arrives that a spaceship has crashed. When they head over, there are two figures — a Santaa alien and a robot — who look just like Santa Claus and a reindeer. The one they had taken for Santa Claus turns out to be a Santaa alien. But with the robot broken, he can't deliver his presents. So Hikaru and the others dress up as Santa Claus to help the Santaa alien out.