to the OP who posted about this manga a couple of days before and I think nobody payed attention, thanks a lot
started the manga 2 days ago and it turned promising
I figured we should wait for not-WSJD-kun to dump instead.
Might as well dump the raws then.
it implodes and kills the Keeper (sister Krone) if they leave their restricted area ie the Gracefield farm, should the Keeper die from causes other than the chip killing them it alerts the demons of the keepers death.