Our world

In the shadowy streets of 1985 Los Angeles, 19-year-old Luna Rodriguez is drawn into the world of a mysterious man who hides a dark secret; he's the serial killer terrorizing the city. As the LAPD hunts him down, Luna becomes deeply entangled in his dangerous life. Though she would never take a life herself, Luna's loyalty leads her down a morally gray path, where love and fear intertwine. She finds herself walking beside him, but always fighting to keep her humanity intact, even as her world spirals out of control.

Story is on my Ao3 as well. You can read there; I may sometimes update the new chapters on there before uploading it on here.