Takeshi Hongo is a promising young man with a passion for motorcycle racing. However, his dreams are suddenly ruined when he gets kidnapped by Shocker, the evil secret organization planning to dominate the world. After being remodeled into a cyborg, Takeshi escapes and swears to protect the world from the inhuman monsters.

Higashigaoka High School’s male swimming club presently has only three second-year members – leader Sakaki Shuhei, Shinozuka Daiki and Koganei Haruyoshi. They welcome the new school year with the aim of getting members.