Uhh, what? Author what were you smoking when you came with the idea of a choker to use in this plot? It don't make no sense? That thing fuction contradict itself and the wearer.
He will die if he attacks the owner or betray but also stop when the wearer tries to commit suicide but like there is a obvious huge loop to this mechanism. What if he attack the owner in hopes of the device killing him aka suicide?...lol we started out good with this manga but it's gets stupider and stupider just to make the winning side look intelligent.
It ain't gonna work for long. We already starting to get fed up with this way of convenient writing.