A mysterious tentacled, humanoid creature destroys the moon of the young highschool aliens' planet, announcing that he will destroy the planet in the same manner in one year. Several assassination attempts to kill him failed due to his Mach 20 speed, the Alien government makes a deal with the humanoid creature to make him the teacher of Vizion high Class 6-F, who are given specially designed weapons that can hurt the creature, and for those who were successfully able to kill the creature before graduation, would recieve 10 million cash reward. --- Riddle school (c) Jonochrome OCs (c) OddlesofNoodles, StarryCats, LinkueiGrandMaster.