The the Irregular at Magic High School, Vol. 18 (light Novel)

A suicide bombing brings the Master Clans Council to an abrupt close! Armed with only the knowledge that the explosion was triggered by corpse manipulation magic, Tatsuya sets off in search of the perpetrator along with Jumonji. After being egged on by his father, Masaki trails behind them to Tokyo in an attempt to one-up Tatsuya’s investigation. But things take a turn for the unexpected when Masaki summons up the courage to propose to to Miyuki