The Five Shinigami That Are Addicted

Five shinigami that are addicted to five very different things. Namely coffee, sex, books, power, and nicotine. Each is aware of their addiction, but none are capable of stopping, and some don't want to. - In the canon universe, between Aizen's defection and the Winter War. Explicit Aizen/Gin, and brief mentions of unrequited Gin/Matsumoto and Gin/Kira. Warnings inside!