"Underdog" follows three boxers who are all underdogs. Suenaga Akira is a boxer, who struggles to succeed as a boxer. Omura Ryuta is a young boxer, who grew up in an orphanage. Miyagi Shun challenges a boxer, following the plans of a TV program.
- Other name: アンダードッグ,Andadoggu
- Genre: Action, Drama, Sports
- Status: Completed
- Duration: N/A min
- Country: Japanese
- Network: N/A
Cast: Abe Ayane, Emoto Akira, Hagiwara Minori, Ito Anzu, Katsuji Ryo, Kazama Morio, Kitamura Takumi, Kumagai Mami, Maeda Otone, Mizukawa Asami, Moriyama Mirai, Nagatomo Ikuma, Nakajima Haruhi, Ninomiya Ryutaro, Takahashi Rion, Takechi Ou, Takiuchi Kumi, Tanaka Haruto, Tokuyama Rito, Tomite Ami, Tsuji Natsuki, Tsuji Shinobu, Wakamatsu Aina, Yoshida Honoka