Osamu Mikumo 13

Short Summary
''Yūma fights Kageura and Ninomiya but is taken down. With Tamakoma Second's substantial inferiority to the top-tier B-Rank teams, Osamu asks Jin to join them.''

Long Summary
Yūma and Kageura begin their battle but it is quickly interrupted by Ninomiya's Hound. Yūma charges at Ninomiya to take him down but Ninomiya shoots Yūma and damages him severely. Yūma attempts a long Scorpion but ultimately fails and Bails Out. Losing the bet, Jin offers to do any one thing for Hyuse, which includes returning his Trigger.

The battle goes on with each party keeping their distance. All the teams decide that not making a move is in their best interests, so they wait until the time's up, giving Ninomiya Unit the victory. With this, Tamakoma Second goes down to #8. Commenting on the battle, Kazama points out that while the aces got the points, the non-aces were the important factor. When asked whether Osamu's defeat led to Tamakoma Second's loss, Kazama states that learning through defeat was the way Rank Battles worked, but that Osamu should have depended on something more reliable than his growth. Reflecting on Kazama's words, Osamu asks Jin to join Tamakoma Second.

Characters in Order of Appearance
Characters in italic are only seen briefly and have yet to make a proper appearance.
 * Yūma Kuga
 * Masato Kageura
 * Haruka Ayatsuji
 * Chika Amatori
 * Shiori Usami
 * Osamu Mikumo
 * Masataka Ninomiya
 * Sōya Kazama
 * Nozomi Kako
 * Yōtarō Rindō
 * Hyuse
 * Yūichi Jin
 * Hikari Nire (voice only)
 * Hiro Kitazoe (voice only)
 * Yuzuru Ema (voice only)
 * Sumiharu Inukai (voice only, flashback)
 * Tsuneyuki Okudera (voice only)
 * Noboru Koarai (voice only)
 * Haruaki Azuma
 * Shinnosuke Tsuji
 * Ai Kitora
 * Jun Arashiyama
 * Kōhei Izumi
 * Ken Satori
 * Shirō Kikuchihara (flashback)

Triggers in Order of Appearance

 * Scorpion (Yūma & Kageura)
 * Asteroid (Ninomiya)
 * Shield (Yūma & Kageura)
 * Grasshopper (Yūma)
 * Bagworm (Ninomiya, Kageura)
 * Ibis (Azuma)
 * Raygust/Shield Mode (Osamu) (flashback)