- 2 Seasons
An alien creature has nearly destroyed the Moon. Its next target is Earth. But the human race has a chance to save itself. The creature will spare Earth if someone can kill it. It even aids the cause of the human race by becoming a teacher at a middle school in Japan and teaching the students the art of assassination. If one of them can kill the creature, they will get ten billion yen and save the world. But trying to assassinate this being proves to be anything but easy.