Silver Linings [Haikyuu!!]

[Alpha/Beta/Omega-verse + Mafia AU] Tsukishima Kei is an omega. For his secondary sex, he's rather atypical. After all, the worst kind of omega there is a scentless omega. Even when in heat, he has never emitted any pheromones. When you take away the one thing that makes people view omegas as somewhat useful...they become useless in the eyes of society. But not only is he scentless, he's also scent-immune. He can't sense an Alpha's presence or another omega's heat nor will pheromones intimidate him. At first, he was thankful. He was able to get by in the majority of his life by disguising himself as a beta, but as he got older, things get progressively more difficult. He's always being overlooked, always being forgotten, always being treated like he wasn't even in the room. Eventually, it got to the point where it seemed like he didn't even exist. The point of the story being, he was completely and utterly alone. What seemed like a blessing in his high school years now was a curse. A curse that might just end up sending him six feet under.
(In which Kei is an active participant in the underworld activities and Kuroo is an officer of the law.)