Ep. 9: The Ultra Evolution Institute staff head to a hot spring trip while an enemy lurks nearby.

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Futaba Mihara, acting director replacing Hokuto, struggles to unite the Shinkalion drivers with their distinct personalities. Commander Shinpei Izumi notices her difficulty and suggests a hot spring excursion for all institute personnel, including Hayato. The group travels to the destination, but an enemy force is spotted in the vicinity. This unexpected proximity of hostile forces creates tension for the staff during their intended break. The narrative focuses on the logistical challenge of managing diverse personalities and the sudden threat that interrupts their relaxation plans.