5. Bölüm: Naota ile Kanti, Haruko için kavgaya girerken devasa bir robot Medical Mechanica tesisine saldırır.

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Haruko begins to switch her attentions from Kamon to Naota, arousing the former's jealousy. They resolve to 'duel' for Haruko, which amounts to little more than an intense airsoft firefight with Kanti, who is allied with Kamon. During the fight, Lieutenant Kitsurubami tries unsuccessfully to blow Kanti away. Mamimi, observing Naota's intimate relationship with Haruko, questions how much he really likes her, leading him to confront her about their relationship. Finally, his forehead erupts with one of the largest objects yet, a leviathan robot, while a gunfight rages between Commander Amarao, his gunmen, and Haruko. Trapped on top of the robot, Naota resolves to save Mamimi and bravely fuses with Kanti. However, despite his and Haruko's best efforts, they are unable to stop the giant robot, which rampages towards the Medical Mechanica plant. Kanti then manifests the power of Atomsk by producing his EB-0 1961 Gibson bass guitar, to the amazement of Commander Amarao and Haruko. Kanti defeats the giant robot, which is actually a gargantuan hand, rocketing over the Medical Mechanica plant and straight into the ground, where it becomes a petrified monument, presiding over the plant. Kanti then separates from Naota, yet retains the power of Atomsk, and then runs away with Haruko. (Source: Wikipedia)