| Oreki Houtarou is a minimalistic high school boy. One day, he joins the Classic Literature Club at his elder sister's request. There he meets Chitanda Eru, Fukube Satoshi, and Ibara Mayaka. Chitanda is a calm beautiful girl but she turns into an embodiment of curiosity once she says, "I'm curious." Fukube is a smiling boy with a fantastic memory who calls himself a database. Ibara is a short girl and is strict with others and herself. They begin to investigate a case that occurred 45 years ago. Hints of the mystery are buried in an old collection of works of the former members of Classics Club. The collection is titled "Hyouka." |
| Name | Character | Episodes |
|---|---|---|
| Ai Kayano | Mayaka Ibara (voice) | 23 |
| Yuichi Nakamura | Hōtarō Oreki (voice) | 23 |
| Yukana | Fuyumi Irisu (voice) | 8 |
| Satsuki Yukino | Tomoe Oreki (voice) | 6 |
| Aoi Yuuki | Matsushiro (Manga club member) (voice) | 3 |
| Toshiyuki Morikawa | Muneyoshi Kugayama (voice) | 3 |
| Saori Hayami | Kaho Juumonji (voice) | 2 |
| Katsuyuki Konishi | Takeo Kaitou (voice) | 2 |
| Aoi Yuuki | Female Student (voice) | 2 |
| Aoi Yuuki | Kurako Eba (voice) | 2 |
| Mami Koyama | Youko Itoigawa (voice) | 2 |
| Miyu Irino | Jiro Sugimura (voice) | 2 |
| Ryotaro Okiayu | Masashi Tougaito (voice) | 2 |
| Ami Koshimizu | Midori Yamanishi (voice) | 2 |
| Ryo Hirohashi | Mamiko Senoue (voice) | 2 |
| Yoko Hikasa | Quiz Research Society Vice President (voice) | 1 |
| Tomokazu Sugita | Cooking club president (voice) | 1 |
| Aoi Yuuki | Nakayama (voice) | 1 |
| Aoi Yuuki | Woman in red swimsuit (voice) | 1 |
| Tomomichi Nishimura | Fukiya (voice) | 1 |
| Shigeru Chiba | Tanimoto (voice) | 1 |
| Unsho Ishizuka | Hanai (voice) | 1 |
| Kaito Ishikawa | Baseball Club Member (voice) | 1 |
| Yuki Ono | A Capella Club Member (voice) | 1 |
| Ichiro Nagai | Takezou Yoshida (voice) | 1 |
| Junichi Suwabe | Konari (voice) | 1 |
| Shinya Takahashi | Calligraphy Club Member (voice) | 1 |
| Daisuke Kishio | Tayama (Magic club president) (voice) | 1 |