The Melancholy of Haruhi Suzumiya (2009)

It is mid-December, and SOS Brigade chief Suzumiya Haruhi announces that the brigade is going to hold a Christmas party in their clubroom, with Japanese hotpot for dinner. The brigade members Kyon, Nagato Yuki, Asahina Mikuru and Koizumi Itsuki start preparing everything for the party, such as costumes and decorations. But a couple of days later, Kyon arrives at school only to find that Haruhi is missing.