Two years after the Build Divers fought to save the EL-Diver, Hiroto wanders the GBN as a mercenary and forms a new team.

Hiroto and his teammates have no choice but to call themselves Build Divers; they play Freddie's mission again, and he invites them to his village.

The Build Divers have accepted a mission to protect Freddie's village; in their rehearsal battle, however, they realize that their poor teamwork will inevitably result in collateral damage.

Freddie introduces the Build Divers to members of the Resistance, who tell them about their planned counterattack operation.

Two years after the Build Divers fought to save the EL-Diver, Hiroto wanders the GBN as a mercenary and forms a new team.

While Parviz experienced great growth in the previous mission, Kazami is resentful about his own inability to distinguish himself.