The Irregular at Magic High School, Vol. 16 (light novel)

Every year the Yotsuba Clan gathers it's most influential and powerfulmembers. And like always, Miyuki has gotten an invitation. There's only one bigdifference this time: direct orders from the Yotsuba matriarch requesting herpresence on New Year's Day and a bargain that may repeal Tatsuya's status as apariah if Miyuki is willing to do whatever it takes...