You have lived as an assassin your whole life and worked under a woman named Luka Megurine. Your co-workers were names Hatsune Miku and Rin Kagamine. One day you are told to take down Miku's boyfriend, but things don't go as planned...
Y/N, a young engineer has been granted a Vocaloid Prototype from his company. Hatsune Miku Model 1, will he fall head over heels with a pop star or simply discard her as simply a machine.