"Dead Man's Galaxy Days" skips back in time to events that take place before MPD-Psycho Volume 1. Yousuke Kobayashi seems like a smart, driven Tokyo police officer, but he'll soon be transformed into a tragic "multiple personality detective." The ongoing mystery of the Gakuso gang and their murderous "barcode clones" unravels further, and MPD-Psycho's strange supporting cast is seen in a totally new light as a serial killer, the Tokyo Mirror Man, terrorizes the city with his chainsaw!