Magical Girl and Narco Wars

魔法少女と麻薬戦争

"Candy," a mysterious drug whose main ingredient is just ordinary sugar, is spreading like wildfire in Tokyo. When Susui, a narcotics agent who has infiltrated the yakuza to get closer to Candy's manufacturer, finds himself in danger, a self-proclaimed "magical girl" named Riri Hoshina comes to his rescue...! (Source: Manga Plus)