As a high school freshman Hotaro has to choose a club to join and picks the Classic Literature Club as his sister had. Alongside fellow member Eru she happens across a decades' old text that indicates secrets of the school and its festival.
Hyouka: Forbidden Secrets
Hotaro Oreki was forced by his older sister to join the Classic Literature club. Upon joining, he met Eru Chitanda; who have great curiosity. When Eru is curious, the energy saving Hotaro just can't say no.