The plot revolves around Natsuo Ishido, a freshman in high school. She has a natural talent for everything she does, and as a result becomes bored with doing anything. She is often praised for her incredible talent, but in reality she feels lonely, so she is often looking for more and more things to occupy her time. As she fails to find anything that is sufficiently challenging, her loneliness and boredom reach a bottomed-out state. One day, after a volleyball practice, she meets Yuzuko Mawatari advertising for the mixed martial arts club, and although at the time she is uninterested, the idea stays with her for the rest of the day. She learns that Yuzuko and one other girl are the sole members of the club, and as such is not an official club yet, so she decides to investigate. She meets the two members and challenges Yuzuko to a spar, in which the two of them exchange glancing blows. When Sanae Sawamura, the captain of the karate team, shows up, Natsuo decides to leave. After she has left, she realizes her nose and lip are bleeding, and she resolves that she hates Yuzuko, and later returns to challenge her to another spar. She loses the spar, but gains a solid interest in MMA to the point where she quits the volleyball team. From that point the story follows her as she overcomes various challenges in order to become good enough to face Yuzuko again in a public match. This culminates in an 8-person qualifying tournament for a later tournament G-girl. Over the course of her second round fight with Sanae Sawamura, Natsuo's backstory is delved into and she faces up to the abuse dealt to her by her older brother. After a close but cathartic loss to Yuzuko in the finals, Natsuo is considered to be good enough to earn a spot as a stand in fighter at G-girl.
Teppu, written and illustrated by Moare Ohta, made its debut in the first ever issue of Kodansha's seinen magazine good! Afternoon on November 7, 2008. The manga finished in the 2015 8th issue of good! Afternoon, published on July 7, 2015. Kodansha compiled its individual chapters into eight tankōbon volumes, released from March 5, 2010 to October 7, 2015.
