Tatsuya and Miyuki are going through not the best of times. Not only have everyone learned that they belong to the Yotsuba family—one of the most mysterious, powerful, and frightening magical families—but they’re also shocked by the news that they are not related as brother and sister, and on top of that, they’re engaged! A string of revelations makes their classmates openly distance themselves, including even close friends. Meanwhile, a regular meeting of the ten main clans is about to take place, meant to address many important issues in the magical world. And this is a great opportunity for the mysterious puppeteer to deliver another terrorist blow…