Reunited with his childhood friend Hinoki, Keita has joined the battle against Algernon as a Head Diver in the Kakuseijin No. 1, a multi-purpose state-of-the-art mecha. Danger abounds as the Akamatsu team travel around the world in search of Algernon.

Meanwhile, Betterman continues to monitor the Akamatsu team's progress and comes to the rescue on more than one occasion. But Betterman has secrets that no one has even guessed. Will discovering them cost the Akamatsu team their lives? Contains 5 episodes!