When the SOS Brigade receives an urgent message that the Computer Research Society's president has gone missing, Haruhi confidently promises to locate him, and the SOS Brigade is off
Of course, they have no idea where to start...
Is the new SOS Brigade insignia that Haruhi designed to blame for all of this

Following the clues in the clubroom, Kyon travels back in time to a familiar place...the same time and place he came with Asahina last summer Kyon again meets with the elder Asahina, but she has no idea what's caused the future to go awry - erm, to go normal. Stoic Nagato is not surprised to find future Kyon at her door (for the second time that night) and prepares a program that will repair the rift. But the decision to administer it or not lies with Kyon...

Quite out of the blue, Kyon receives a phone call from his middle school classmate Nakagawa. Six months ago, he spotted Kyon walking with the most beautiful girl he'd ever seen and instantly fell in love Now he wants Kyon's help conveying his feelings. But Nakagawa has no idea that the fair maiden who stole his heart is actually an otherworldly being...Nagato? How will the stoic alien react to Nakagawa's affections?

A new school year means fresh blood for the SOS Brigade But not just anyone can join this elite group of alien-, time traveler-, and esper-hunters As Haruhi puts the new recruits through their paces in one timeline, the veteran members visit the ailing Yuki in the other. Yuki reveals that her illness may be the work of other humanoid interfaces like herself, but when Kyon rushes to confront them, he runs into a familiar face he had hoped he would never see again...