This tells a story about an angel name Blade. He is accidentally release by a high school student name Rane. He was betrayed by his fellow angels who joined Lucifer in the rebellion. Blade is going to be the Teacher-Adviser of class II-A which Rane is belong. He is shameless, rude,miser, clever and a little bit cruel. He is cursing! His mission is to defeat the fallen angels who betrayed him and summon them to hell.