The Classics Club gives Houtarou Oreki an unexpected reason to spend the energy he would rather save. Together with the endlessly curious Eru Chitanda and his friends Satoshi Fukube and Mayaka Ibara, the high school freshman finds himself investigating puzzling incidents in their everyday lives.
Oreki's involvement starts with a demand from his older sister, Tomoe: save the memberless club from being disbanded. When he arrives at the clubroom, however, Chitanda has already joined, apparently leaving him free of that obligation. It is her lively personality and curiosity, rather than his sister's insistence alone, that keep him involved. Oreki chooses to become a member, and Fukube and Ibara bring the group to four. With Chitanda supplying the questions, even seemingly minor mysteries become matters for the Classics Club to investigate.
