hell me find a BL

I just need the name, the story is about an orphaned brown haired boy with this other black-haired kid. the present storyline is them meeting together as adults when the brown hair twink dude is the manager of the black haired kid but he doesn't know because he wants information on this serial killer named august. the story is really angsty and it involves some murder mystery shi I cannot remember anything else and my memory might be fooling me since I read this last year or something. thank you so much