My one and only light

Part of the AkaKuro AU! Challenge. Kuroko Tetsuya is Toushima's number one informant, but he's more than just that. He works for the Vischio, and is closely acquainted with the mysterious Akashi, a strange man who shows up to kill those who indulge in a certain drug. But what is Kuroko's true relation with this bloodthirsty man? Akashi/Kuroko. Complete.