Earthian.

Chihaya and Kagetsuya, two polar-opposite angels from the planet Eden, travel to Earth to track the positive and negative actions of its inhabitants, Earthians. Once 10,000 minus checks are gathered against Earth, the planet will be destroyed. One of many pairs of angels judging the planet, Chihaya and Kagetsuya quarrel vigorously at first but gradually develop a special relationship with each other.