In a world where 'Kings' wield supernatural powers and lead their clans, protecting their members is paramount. When a video implicates student Yashiro Isana in a brutal murder, a manhunt ensues, pitting him against the formidable swordsman Kurou Yatogami, known as the 'Black Dog.' As the Red King Mikoto Suou faces his own challenges, Yashiro's quest for innocence unveils a sinister plot, stirring doubts among his allies. What started as a murder investigation escalates into a clash of Kings, threatening global consequences.