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Earthian (アーシアン, Āshian) is a yaoi manga by Yun Kōga. It is about angel watchers of earth which was made into a J.C.Staff-produced anime OVA. The angels' roles are to assess the progress of humans giving them positive and negative scores based on their everyday actions. The angels, who have deemed that the Earthian are becoming far too destructive, decide that if the Earthian reach 10,000 negative marks instead of positive, then their world will be destroyed.