A long-awaited complete reprint for fans of Mitsuteru Yokoyama! This science adventure manga follows the adventures of a father and son who come to Japan from Krypton, the planet where Superman lives. The protagonist, Goro, is a bright, energetic boy attending elementary school. He loves baseball. However, whenever an incident occurs, he transforms into Red Mask. Together with his father, he flies through the sky, displays his incredible strength, defeats villains, and solves the case. This wildly popular series, serialized in Shueisha's monthly magazine "Omoshiro Book," is being reprinted in its entirety, including the color pages.