“Misuterikku Sain” (ミステリックサイン)
The website of the SOS Brigade website has been created, but it is composed of little more than the club logo. Coincidentally, the SOS Brigade gets their first case after the website goes up, in which the Computer Research Society president has been reported missing by Emiri Kimidori, who falsely claims to be his girlfriend. Upon going to his apartment, the club members see that he is nowhere to be found, and nothing seems too out of the ordinary on the surface. However, after Haruhi leaves, the others return back to the apartment where they enter a sealed reality somehow created by the president, trapped inside a data entity known as a camel cricket. Kyon and Mikuru watches as Yuki and Itsuki defeat the camel cricket, thereby recovering the president. It is later realized that the club logo that Haruhi had drawn was the catalyst for the sealed reality.