Because the original manga (drawn by Yuki Kaneshiro, written by Ren Mikage) is ongoing or has multiple endings depending on the media, fans have sparred over the true meaning of the title’s ellipsis. What is the full phrase?
Let’s be honest: the "undercover agent" trope is saturated. We’ve seen the suave James Bond clones, the gritty Jason Bourne amnesiacs, and the edgy high school spies. So what makes this series different? secret mission sennyuu sousakan wa zettai ni