- Drama: Hard Nut (literal title)
- Romaji: Hado Nattsu
- Japanese: ハードナッツ!
- Director: Hayato Kawai, Kojiro Hashimoto
- Writer: Mitsuharu Makita, Masahiro Yamaura, Koji Tokuo
- Network: NHK
- Episodes: 8
- Release Date: October 20 – December 8, 2013
- Runtime: Sundays 22:00-22:48
- Language: Japanese
- Country: Japan
Plot
Kurumi Nanba (Ai Hashimoto) is a student majoring in math at prestigious university. She’s viewed as a weirdo due to her poor communication skills, but having a genius level intellect. Meanwhile, Tatsuhiko Tomoda (Kengo Kora) is a young detective. Kurumi Nanba and Tatsuhiko Tomoda work together to solve difficult cases including a series of bomb explosions, a locked-room murder and corporate blackmail.
Cast
 |  |
| Ai Hashimoto | Kengo Kora |
| Kurumi Nanba | Tatsuhiko Tomoda |
Additional Cast Members:
- Kenichi Yajima – Masahiro Aoyama
- Kazuki Namioka – Jun Takagaki
- Tatsuya Hino – Yoshikura
- Masanobu Katsumura – Koji Kobayashi
- Mami Hashimoto – Saori Takano
- Maya Okano – Natsuko Asao
- Hiroshi Okochi – Atsunori Gondo
- Kyusaku Shimada – Michiaki Yuzawa (ep.1-2)
- Yoshiyuki Morishita – Takita (ep.1-2)
- Masahiro Toda – guard (ep.1-2)
- Takashi Kitadai – Reiji (ep.1-2)
- Shogen – Magellan Otsuki (ep.1-2)
- Masahiro Kohama – (ep.1-2)
- Kazuaki Shimizu – (ep.1-2)
- Chisato Kawai – (ep.1-2)
- Shigeru Saiki – Koitabashi (ep.3)
- Noriko Nakagoshi – Iroha Tsutusmi (ep.3)
- Komatsu Toshimasa – Fumiya Sanjyo (ep.3)
- Kensuke Owada – Manabu Sakashita (ep.3)
- Yuki Meguro – Takahiro Saeki (ep.4)
- Norimasa Fuke – Kawakami (ep.4)
- Yasuto Kosuda – Shinichiro Natsume (ep.5)
- Sachie Hara – Rikako Natsume (ep.5)
- Kohki Okada – Satonaka (ep.5)
- Anna Nose – Mai Satonaka (ep.5)
- Hisashi Yoshizawa – Michio Kijima (ep.6)
- Goshu – Yoshiya Mochizuki (ep.6)
- Bokuzo Masana – Satoshi Nishio (ep.7-8)
- Shoko Ikezu – Kanae Misawa (ep.7-8)
- Shigemitsu Ogi – Osabe (ep.7-8)
- Yu Tokui – Taichi Kawashima (ep.7-8)
- Zen Kajihara – Tokizo Tsuruhashi (ep.7-8)
- Yosuke Saito – Shunichiro Oide (ep.7-8)
- Takeshi Masu – Kurunuma (ep.7-8)
- Masanobu Sakata – doctor (ep.7-8)
- Rie Miyamoto – nurse (ep.7-8)