「知っちまったんだよ。あいつらと走る方が─」
キャノンボーグが地球に来襲してから長い時が経った。
改造隊長を名乗り人々を苦しめてきたキャノンボーグ。
しかし大也たちに悉く作戦を阻止されギャーソリン回収量はごく僅か。
ハシリヤン本家からの重圧もあり、キャノンボーグにはもう後がない。
思い通りに作戦が遂行できないことに痺れを切らしたキャノンボーグは、奥の手である“大量悲鳴兵器”を起動。
その恐ろしさを知る先斗とビュンディーは血相を変え、
地球が“死の星”になると呟く。
兵器発動までのタイムリミットが迫る中ブンブンジャーが出動。
今こそキャノンボーグとの始末をつける時。
先斗が選ぶ選択は──。
"I found out. It's better to run with them..." A long time has passed since the Cannonborgs attacked Earth. Calling himself the modified captain, Cannonborg has tormented people. However, Daiya and his friends have thwarted all of his plans, and only a small amount of Gyasoline has been recovered. With the pressure from the main family of Hashiriyan, Cannonborg has no choice. Frustrated that the plan cannot be carried out as planned, Cannonborg activates his last resort, the "mass scream weapon." Knowing the horror of this, Sendou and Bundi turn pale and mutter that the Earth will become a "dead planet." As the time limit for the weapon to be activated approaches, Bunbunger is deployed. Now is the time to settle things with Cannonborg. What will Sendou choose?
