Heisei Shounen Dan 平成少年ダン　Vol.1 by Sankaku HeadUmaru is a young man who knows no progress in his job or even in his relationships. In addition, he is very nostalgic for his childhood, set during the Heisei era (1989 2019), and cannot detach himself from it. It is then that a very strange event will occur and Umaru will see his spirit projected into the past and integrate the body of a toy he owned when he was a child. From then on, a unique adventure will begin for the two Umaru which will help