Your school's hosting a Secret Santa instead of doing a Christmas dance and you just happened to pick out the name of your crush. You want to give him a good present that he will like, but sadly, you don't know him much at all. So you interact with other characters in game, or even the crush himself, to find out what the perfect present for your crush is to impress him and hopefully make him fall for you. The present you chose in the end determine the ending you get.

[From Official Site]