Kiyahlyn Mayumi had just started 6th grade.. and is already hating it. From surviving boring lectures to procrastinating on half of her assignments. Nothing crazy would happen to her this school year.. Right? Or that's what she thought. Lately, mythological monsters, Demons, and Tyrants from Tartarus have been crawling out of their chamber and into the mortal world itself. Hunting for the one who had the blood of " The traitor " Now, Kiyahlyn, together with her friends, has to fight for the sake of humanity from falling into the grasp of the wrong hands, solve the mystery of the fallen Tyrant, and defeat the one who started the apocalypse in the first place.