Good Work Watase-San summary:

A second s**, Dom/Sub, emerged in the evolution of mankind. Doms dominates Subs and Subs are subordinate to Doms.Watase, who is a "sub but top," distanced himself from s** from play due to the trauma of being being almost forcibly dominated by his Dom lover in the past.One day, he quickly went to a shop that specialized in s** toys in order to satisfy his lu**.When he confesses to Touma that he is a submissive top he gets an unexpected reply, "I'm a dominant bottom"?!+