The setting is Shibiru City, Yukimachi Town. While most citizens are enjoying the peace and quiet, one young man makes a stand. His name is Hazama Masayoshi.

Shibiru City is now home to a superhero named Samurai Flamenco. By pure chance, policeman Goto Hidenori learns the identity of Samurai Flamenco, resulting in numerous headaches as he copes with the new hero's atypical sense of justice. Goto arranges for a meeting to put a stop to all of the trouble, but Masayoshi shows up drenched. Masayoshi explains that he doesn't use umbrellas because of an incident in his past.

Samurai Flamenco is receiving more and more views on video sharing sites. Masayoshi is very pleased until a news site begins offering a reward to the person who unmasks Flamenco. That is when another person comes out as Samurai Flamenco. Who is this fake and what is his objective? The battle of Samurai Flamencos is about to begin.

After dealing with the imposter, Samurai Flamenco gets to catch his breath, but then he's captured by some lawbreakers he approached. When all hope appears to be lost, a mysterious new hero appears and saves him. However, the new hero knows Samurai Flamenco's true identity and sees him as a rival. Samurai Flamenco now has a rival superhero. What next?

Flamenco Girl has powered up by recruiting additional Flamenco Girls! She's enjoying life as she fights evil and performs as an idol. Meanwhile, Samurai Flamenco is on the run as the citizens have turned against him.

Masayoshi's efforts have paid off, as Shibiru City has seen a drop in crime. His acting career is also picking up. Life is looking good, but Masayoshi isn't celebrating. Instead, he begins to question what he should be doing as a hero. Troubled, he returns to reading his grandfather's notebook, but it turns out that the story of Samurai Flamenco hides a shocking secret.