Disappearance Movie :3

[Miss Hake]

The story takes place from December 16 until December 24, a month after the cultural festival. The SOS Brigade, led by Haruhi Suzumiya, make plans to have a nabe party for Christmas. However, on the morning of December 18, Kyon arrives at school and finds out everything has changed. Haruhi and Itsuki Koizumi are missing, Ryoko Asakura has mysteriously returned, Mikuru Asahina does not recognize him and Yuki Nagato is an ordinary human. Only Kyon is aware that everything is different, as no one remembers anything about Haruhi or the SOS Brigade. The only clue Kyon manages to find is a bookmark left by the alien version of Yuki before everything was changed, telling him to gather 'keys' to run a program. While wondering about this clue, he gets to know the new Yuki, who appears to be quite fond of him. As December 20 comes, Kyon learns from Taniguchi that Haruhi was at another high school the whole time, along with Itsuki. By revealing his identity to her as 'John Smith' (his alias when he first traveled back in time and assisted a young Haruhi), Kyon manages to convince Haruhi to believe his story. With her assistance they gather the SOS Brigade together in the club room, thus bringing the keys necessary for a program built by alien Yuki.
Wanting to go back to his interesting life, Kyon activates the program and goes back in time to the Tanabata of three years ago. After meeting up with the future Mikuru, he obtains an uninstall program from the past's Yuki, which needs to be shot at the culprit right after the change in the early hours of December 18. Returning to the present, they find the culprit, Yuki, who had borrowed Haruhi's power to change everyone's memories except Kyon's, giving him the choice of which world he would rather live in. Kyon questions himself about his choice, and decides that his original world was more interesting and fun. Kyon tries to install the program into Yuki but is stabbed by Ryoko, who had retained her psychotic behavior. Before Ryoko can finish him off, he is rescued by future counterparts of Yuki, Mikuru and himself. He wakes up a few days later in a hospital, where the world is back to normal, but almost everyone believes Kyon had been in a coma since December 18 after having fallen down the stairs. When Yuki mentions to Kyon how the Data Integration Thought Entity would punish her for her actions, Kyon tells her to let them know that if they ever do, he can tell Haruhi about him being John Smith and have her alter reality so the Data Integration Thought Entity would cease to exist. As December 24 comes and his everyday life returns, Kyon stops by the SOS Brigade's clubroom as he smells a spicy fragrance coming from it, meaning that Haruhi and the others had already started working on the nabe. Convinced that there is still time until he has to go back in time to save himself, and restore the original world, he enters the room with a fresh smile on his face.

Spoiler:

Hope you like it. <3