Kaid . 8 / 12 (2026)

The Eastern Division of the Japanese Defense Force continues to face a coordinated attack by giant monsters. Narumi and Kikoru have already eliminated their targets, but Hoshina is still battling Monster No. 12, the final version of the prototype that was Number 10. Even Hoshinas cooperation with Number 10, transformed into a monstrous weapon, is not going as planned: despite their efforts, they cannot coordinate well enough to use their full potential in battle. Can Hoshina win the most difficult sword duel of his life?