Candy & Cigarettes

Meet Raizou Hiraga, a retired officer from the Tokyo Metropolitan Department. After learning that his grandson is stricken with a deadly illness requiring expensive treatment, Raizou comes across a job flier for the mysterious SS Agency. However, upon taking his first job with 11-year-old Miharu Suzukaze, he discovers that his new occupation is more than it seems... (Source: Mangadex)