Spoiler (mouse over to view)
For the whole series Nezumi desperately held on to Shion, refusing to let him go. And in the end he suddenly decides to wander around the world leaving Shion behind? Nezumi even says that there "is nothing to come back to". Did I miss some kind of turning point? Did he actually only use Shion to "destroy" No. 6 and his feelings were not real? Was the author rushed? I don't get it, any theories?
________________
~Give time when it's needed~