Masayoshi Hazama, inspired by his grandfather and hero shows, transforms from a model by day to the quirky vigilante Samurai Flamenco by night. With his homemade costume and lack of combat skills, Masayoshi aims to eradicate crime in the city, though his efforts are met with skepticism. As he garners attention and allies like the righteous officer Goto and a diverse group including a J-pop trio and a martial artist, Masayoshi's superhero fantasy unfolds. However, his simplistic crusade against minor wrongdoings evolves into grand confrontations, thrusting him into a global-scale crisis. Amidst the chaos, Masayoshi grapples with the essence of heroism, discovering what it truly means to be a savior.