Kichi wa ijō han'nō o kanchi shi, seinen erīto chīmu zentai ga shutsudō shita. Mokuhyō o hakken shita nochi, taichō wa sentō meirei o dasazu, Musashi wa kyokanaku kaijū supīdo no haigo o tonda. Kaijū no chūsū shinkei wa nō no oku ni ari, masui-dan o tsukatte uteba daijōbuda to itta. Yosō-gai ni kaijū wa totsuzen osoi gakari, Musashi wa mokuhyō o soto shita. Kaijū wa shigeki sa rete nigedashi, tsuchi Igaki to Ayano ga unten suru uchū-sen ni shōtotsu shita. Yakō-sei no kaijū supīdo wa naze hakuchū ni arawareta no ka? Kaijū no shin'i o shiru tame ni, Musashi wa tekku sandā 4-gō ni notte sora o tonda.
The base detected an abnormal reaction, and the entire youth elite team was dispatched. After finding the target, the captain did not issue a combat order, and Musashi flew behind the monster Speedo without authorization. He said that the central nervous system of the monster was in the back of the brain, and it would be fine if he used an anesthetic bullet to shoot it. Unexpectedly, the monster suddenly attacked, and Musashi missed the target. The monster was stimulated and ran away, hitting the spaceship driven by Doigaki and Ayano. Why did the nocturnal monster Speedo appear in broad daylight? In order to understand the monster's true intentions, Musashi flew into the sky in the Tech Thunder 4.
