Nishino Kanako was your run-of-the-mill office worker until she accidentally landed a job as a hitman. It turns out she's got crazy levels of talent for the work, but her personal life is still kind of a mess. Finding out that your boyfriend is a killer out for your life certainly doesn't help your self-esteem! Now, after resolving to live for her work, Kanako finds herself at a social gathering of fellow assassins. Tensions couldn't be higher-Kanako had better watch her back!