Hanashi Kirisaki was raised to be an assassin by an assassination organization. One day, on an undertaking, she attempted to kill a female manga artist. As usual, she was just trying to get the job done in a professional manner, her world changes drastically when she reads Tokimero, a manga serialized in the target magazine! She develops a strong yearning for the heartwarming adolescent school life! Hanashi immediately quits her job as a hitman, and for the first time, enjoys a normal student life, but an assassin is sent to her by the organization.