A resident of Akagicho, high-schooler Yamato finds himself locked up after starting a fight. His classmate, Teru, appears and makes him a deal. In exchange for getting him out of jail, he wants Yamato to take on a job for him. Yamato and his rival, Ryugo, head for the designated spot, but are set upon by thugs Teru riled up. When the two teens win the brawl, Teru takes them underground, where the boys are in for the shock of their lives.
They have fitted Earth with a new core 
to attune the atmosphere to their needs.
Sie statteten die Erde
mit einem neuen Kern aus,
Instalaron un nuevo núcleo en el planeta
Ils ont équipé la Terre
d’un nouveau noyau
Hanno sostituito il nucleo della Terra
per adattare l'atmosfera ai loro bisogni.