Yokokuhan - The Copycat

Terrorist organization "Shinbunshi" was taking down criminals and posting their exploits online. High school student Hanaoka Takeru is stunned by them and begins working as a copycat alongside Nishizawa Kyoko, a classmate, and Endo Sota, a childhood friend. Under the guise of "righteous loss," the three start obtaining donations from the public in return for punishing the villains and posting the entire tale online. Even after the actual Shinbunshi passes away, the imitators rise to fame as internet celebrities. Finally, the police start looking into them too.