The series centers on Gorou, a 24-year-old man aspiring to become the ultimate Condom Battler. His primary weapon is a 0.01 mm condom, which he loads into an arm-mounted dispenser; upon deployment, it expands into a red, rubbery armor that Gorou wears during combat. This gear also grants the hero the power to summon sperm and form attacks from the resulting sticky substance. Other characters in the anime, such as Miku and Hayato, engage in duels using their own condoms. While the show is packed with absurd dialogue and battles, these heroes consistently ensure that a sex education lesson is delivered along the way.