"A hero will never give up, never hide, never be defeated and never accept evil!" Holding firmly to these words, Masayoshi Hazama has been obsessed with superhero shows since childhood. During the day, he earns his living as a famous model, and at night, he transforms into the gallant hero Samurai Flamenco. Armed with nothing but his superhero costume, he strives to bring justice to the city and confronts anyone who breaks the law—even rebellious juveniles and people who litter on the street. Masayoshi's heroic antics eventually catch the public's attention, leading to the fateful discovery of his identity by policeman Hidenori Gotou. Although Gotou initially tells Masayoshi to leave crime-busting to the police, he ends up joining him in his antics. However, things soon escalate from preventing littering and petty thefts to bizarre adventures that even involve the fate of the world. Together with their newfound comrades, Masayoshi and Gotou embark on a battle with the world and themselves in order to find the true meaning of being a hero—with or without superpowers.