Tamakoma Second goes into their first Rank Battles as #21 and easily rises to #12.
On February 1, Yūma and Chika would be fighting, but not Osamu due to his injuries. Kido approaches Osamu and asks him about the press conference. Osamu reveals that he knew about the scapegoat plan, and orders Kido to never use Yūma or Chika like that. Kido complies, explaining that Shinoda and Rindō weren't involved.
At the Rank Battles, Taketomi, Ebina Unit's operator, is a commentator, with Osamu and Satori. Satori explains how the battles work, with 1 vs. 2, and 2 vs. 2. He also explains the points systems, killing gives you 1 point, and being a survivor at the end gives you 2. Tamakoma Second, #21, has their first battles against Mamiya Unit and Yoshizato Unit. Taketomi inquires about a disadvantage that Tamakoma Second has, since it was a 2 vs. 6 match. Osamu replies that it wasn't a problem. Yūma and Chika go on to easily defeat the two teams, rising to #12. On February 4, Tamakoma Second will fight Arafune Unit and Suwa Unit.