The focus of Coin Laundry Lady revolves around Maoko, a quirky individual who frequently visits a washroom and disconcerts others with her mischievous behavior. She takes pleasure in surprising clients by bounding off machines or showing up unexpectedly. With every segment, Maoko's enigmatic history and spooky pranks are revealed through unique situations. In the background, Kiyohara effortlessly incorporates mundane events like searching for work and celebrating the holidays. The book concludes with a thrilling ending, featuring a two-part story titled Suzuki Shimai (鈴木姉妹) in addition to the existing chapters.