As Takeshi Hongo trains for a motorcycle race, he is suddenly swallowed by a fissure in the ground. He barely escapes danger by transforming into Kamen Rider, but he is attacked by the Shocker kaijin Worm Man, who created the fissure. Rider is tormented by Worm Man's attacks until he corners him with the Rider Jump and Undercut... Published in 1972, Mitsuru Sugaya's version of "Kamen Rider", which built the golden age of Bouken-Oh magazine, is fully released in e-book format!