Two years ago, a super-giant “unidentified event” Manju suddenly appeared in southern Nagano Prefecture. They were gathered as mankind's only hope to fight against it! "Their name is Giant Sentai Zyuman!" A giant hero squadron romance (?), a shocking opening with the long-awaited challenge of the super talented superhero who created a sensation with "Koi no Mon" and "I am a Nama Gundam"!!