Shiratori Kazuko's Number of Strokes Is 31

Every hardship is a foreshadowing of happiness. A crime suspense filled with misfortune! One day, Shiratori Kazuko, a 29-year-old single office worker, reunites with her first love, Hiroshi, and finds herself at the height of happiness. However, this is also the beginning of despair for the two of them. A man named Kuroda suddenly appears, leading to violence, organ trafficking, and murder... Will the two be able to grasp happiness?