การหายตัวไปของสึซึมิยะ ฮารุฮิ

"Am I happier in the world that had Haruhi in it, or the one where she disappeared?"

A week before Christmas, Kyon wakes up in a world where the SOS Brigade doesn't exist. Mikuru and Yuki don't recognize him, and Haruhi and Itsuki seem to have vanished.