Casshern Sins: the complete series  CasshernHave you ever felt
regret? The sort of regret that leaves an ache in your heart
that feels like it would never go away? Now imagine you had that
feeling but remember nothing about why you feel that way. This
is the dilemma faced by the titular character in Casshern Sins.
As the series opens we find the immortal Casshern fighting for
his life against hordes of faceless robots.  We soon see that
Casshern is a reluctant fighter, only doing so when his survival
is threatened. We also see that when fighting he has little
self-control, initially only able to stop when the last moving
body in the area is destroyed. Why does he fight? Again, at the
beginning it’s a mystery to Casshern himself. The robots who
constantly attack him provide some clues. First they are
inspired by a rumor that if they eat him, they too will become
immortal. For they are all, unlike Casshern, slowly rusting away
from what they call the Ruin. And that is all evidently
Casshern’s fault.  Luckily as