Takamachi Kariya is not the most popular student in Higashikami High. A violent punk with rumored gang ties, one gaze from his foul eyes is enough to make the girls cry. However, one day, he has a new item a level above the rest added to his poor resume: brother to the Demon Lord.Kariya is suddenly reunited with Kureha, his sister he hasn't seen in five years and learns that she has inherited the awe-inspiring power of the king of demons. But power divides. Not long after, an up-and-coming demon hunter shows up in town in Kureha's pursuit.What follows is a deadly, twisted game of tag, where nothing—nothing—is as it seems.