As alien invaders plot to conquer the Earth, two Boy Scouts steal a mini-submarine and discover Gamera in their midst. Transported to the alien's spaceship, the Scouts are menaced by the evil inhabitants, including Viras, a squid-like monster that grows to colossal size to battle Gamera.

When a giant stone statue on Wester Island is disturbed, the legendary monster Jiger appears and heads for Japan. Gamera tries to stop this new rival, only to be injured when Jiger lays eggs inside of him. As two boys in a submarine go on a dangerous quest inside of Gamera's body to save him, Jiger threatens the Expo '70 world's fair in Osaka.

In this sizzling escapade, three irresistible vixens—Dump, Hip, and Bump—deliver a daring, alluring masterclass in mischief. Dump, a martial arts maven, combines lethal moves with an untamed sensuality, while Hip captivates with her razor-sharp wit and magnetic allure. Meanwhile, Bump’s sultry charm turns even the staunchest hearts to mush. Under Masako Sakamoto's provocative orders, they plunge into hedonistic debauchery at the “Dream National Assembly.” First, they seductively manipulate sauna sirens into high-stakes bets that pay off handsomely. Next, they incite wild, erotic revelry at a ghostly bar, unleashing an intoxicating tide of risqué abandon. Finally, their provocative presence ignites a deluxe key club with unbridled, seductive intensity, transforming scandal into a lush celebration of desire.

When Daisaku Hotta (Kosaburo Onogawa), the cheer leader of Tonan High School, hears that Rikiya Kudo (Saburo Shindo), the captain of the Judo team and Shiro Usami (Kei Wakakura) of the boxing team are about to fight, he breaks it up that are apt to erupt so suddenly on campus. Rikiya is an honor student, recommended to the Toa University by his school and is almost certain of being accepted next spring. Shiro is long on brute strength but short on brains. Naturally, they waste little love on each other, so there is very little ground for any understanding between them.