Ippanjin

At just 20 years old, this ordinary office worker at a stamp center finds her life turned upside down when she's accidentally swept into the criminal underworld of the Akugyoku. Desperate to survive, she bluffs her way through by claiming to be a surveillance-evading genius known as the 'Swindler.' With zero combat ability to her name, she relies entirely on sharp instincts and an innately kind soul to navigate deadly situations. When a pair of mysterious siblings become targets, she makes a life-altering stand that transcends both the law and the fear of death—completing her profound transformation from an unremarkable civilian into a true villain in her own right.