Ep. 5: Naota and Kanti duel for Haruko while a giant robot attacks the Medical Mechanica plant.
Haruko shifts her attention from Kamon to Naota, sparking Kamon's jealousy and leading to an airsoft duel with Kanti. Lieutenant Kitsurubami fails to eliminate Kanti during the skirmish. Mamimi questions Naota's feelings for Haruko, prompting a confrontation. Naota's forehead erupts with a massive leviathan robot as Commander Amarao and his gunmen engage Haruko in a gunfight. Trapped atop the robot, Naota fuses with Kanti to save Mamimi. Despite their efforts, they cannot stop the giant robot, revealed to be a gargantuan hand, from rampaging toward the Medical Mechanica plant. Kanti then manifests Atomsk's power using his EB-0 1961 Gibson bass guitar, astonishing Amarao and Haruko. He defeats the robot, which crashes into the ground and becomes a petrified monument. Kanti separates from Naota, retaining Atomsk's power, and flees with Haruko.
Episodes
- Ep. 1 · Naota encounters Haruko after a neck kiss incident in ordinary Mabase
- Ep. 2 · Naota discovers his empty head while Mamimi worships a flying robot as a god
- Ep. 3 · Naota and Ninamori face personal scandals and supernatural cat ears during a school play rehearsal.
- Ep. 4 · Haruko's baseball prowess and a satellite threat endanger Naota in Mabase.
- Ep. 5 · Naota and Kanti duel for Haruko while a giant robot attacks the Medical Mechanica plant.
- Ep. 6 · Haruko seeks Atomsk while Naota kisses her and escapes to space in Mabase's aftermath.