As night falls, the hustle and bustle of the city gradually sinks into the abyss of silence. Only the cafes on the street corners still shine with dim lights, as if they are specially designed for those souls who cannot sleep. Hu Kexin sat by the window, holding a cup of bitter coffee that had already cooled down tightly in her hand, looking blankly at the occasional passing vehicle outside the window. Her mood was just like this cup of coffee, bitter and heavy.