The Irregular at Magic High School The Movie: Yotsuba Succession Arc

During winter break, Miyuki receives a mandatory invitation to the Yotsuba New Year’s reception, where the next family head will be chosen. She and Tatsuya travel to the main residence as the clan prepares a formal selection. The stakes are clear: if Miyuki is named successor, Tatsuya’s status within the family changes, but she will be bound to an arranged marriage under clan rules. Private discussions and ceremonial reviews lead to a final declaration that installs Miyuki as the next head. To keep Tatsuya within Yotsuba authority and prevent outside claims, the engagement between Miyuki and Tatsuya is finalized at the same time. The announcement settles the succession but triggers political ripples beyond the house, setting the stage for objections from rival clans as the siblings return to school life under a new balance of power.