Suzumiya Haruhi no Yuuutsu

Kyon is an ordinary freshman high school student who, self-admittedly, has given up his fantasies of ESPers, time travelers, and aliens as he left middle school. However, sitting behind him is the beautiful, intelligent, and eccentric girl Haruhi Suzumiya, who in her class introduction blatantly states her singular desire in meeting aliens, time travelers, sliders, or ESPers. Interested, Kyon starts trying to make small talk with her before class, eventually leading to normal conversations with Haruhi. One day, after making a comment about Haruhi's displeasure with the available school clubs, he finds himself dragged into membership of the newly formed Spreading Excitement All Over the World with the Haruhi Suzumiya (or SOS) Brigade.

(Source: Wikipedia)