Story takes place in the 1940's, in a fictional Japan, where the country is dominated by the upper class and the country suffers from a huge income disparity between the rich and poor. During this time, an evil masked villain named "K-20" roams around Japan stealing priceless artifacts. Always on the trail of K-20 is his arch nemesis Akechi - a suave detective. When Akechi announces his engagement to the rich heiress Yoko Hashiba, K-20 warns Akechi to call off the wedding or he'll be there to make his biggest heist yet. Meanwhile a good natured circus performer named Keikichi Endo is hired by a mysterious figure to snap photos of Akechi and Yoko's wedding. Keikichi is unaware that his employer is in fact the evil K-20 and he's being set up to be his fall guy.
Hana comes from a family that has been thieves for generations. Hana refuses to become a thief and she wants to live a normal life. She currently works as a librarian and she is dating Kazuma, who works as a public officer. She hears that Kazuma’s family are all public officers. One day, Hana visits Kazuma’s family. She discovers that Kazuma’s family, including Kazuma, are actually all police officers. Kazuma gets involved in a case and falls into trouble. To help Kazuma, Hana helps her family commit theft.
Hana and her family of master thieves hides from the world by pretending to be dead. They live at Kazuma’s home. Hana’s father Takeru never stops stealing. Due to that, Kazuma’s father Norikazu gets sick. Hana’s family moves out from Kazuma’s home. Also, Hana and Kazuma move into an apartment together, which is old and small. They finally can live their own lives, which is happy and peaceful, but, Kazuma still has to lie to people that he is single. This is because Hana is supposed to be dead. They get into trouble
Grade-school teacher Shinichi just can't get any respect. His wife treats him like a nuisance, his daughter ignores his every word, his coworkers think he's pitiful. His students regard him as a bore and an imbecile, and mercilessly bully his son, who wants nothing to do with him as a result. The only place Shinichi can find any confidence and self-esteem is alone in his room, where he's secretly sewn together a costume. It's a perfect replica of the suit worn by Zebraman, the hero of a third-rate 1970s superhero show that nobody remembers except Shinichi -- and much to his joy, the new, wheelchair-bound student at his school. At the same time, strange things are occurring throughout the area. The citizens are nervous, and the military has dispatched agents to uncover - or perhaps cover up -- the source of the danger. Shinichi's urge to sneak out and prowl in his costume, to feel what a hero feels when guarding the night from evil, soon has him dragged into an increasingly bizarre mystery.
School teacher Ichikawa, sometimes known as Zebraman, suddenly awakes 15 years later in the year 2025. The megapolis known as Tokyo has now been renamed to Zebra City. The city has become virtually crime free due to a new measure known as "Zebra Time." Every morning and evening for five minutes "Zebra Time" is implemented, which allows the Zebra Police to eliminate any potential criminals. Soon enough, Ichikawa comes under attack by the Zebra Police, but is saved by Ichiba and taken away to a safe haven known as the "White Horse House". At the "White Horse House," survivors of "Zebra Time" recover from their wounds, while plotting methods to overthrow the city's govenor who implemented "Zebra Time". Throughout all of this, Ichikawa has lost his memory & cannot remember his past as Zebraman ...
