Mysterious bombings continuously happened in Tokyo. As for now, Roidmudes are primarily suspected of the bombings. While Drive and Mach went to an amusement park, Mach was quickly incapacitated by a bomb. Meanwhile, an injured Chase is currently in a hospital with Kiriko as his caretaker.

Kiriko continues to secretly harbor Chase while an impatient Go tries to rush the Mach Driver's repair.