Housekeeping Mage from Another World: Making Your Adventures Feel Like Home! Volume 5 by You Fuguruma

A crisis hits the Tris Cathedral the day before the much-anticipated Nativity Festival! When half of the orchestra for a famed songstress falls ill, Shiori is called in to help provide some much-needed backup with her illusion magic. However, the songstress soon reveals that a rival performer may be plotting her downfall, and more danger may yet be waiting around the corner. Will Shiori and Alec become targets themselves? And will Shiori’s illusion magic be enough to save the songstress’s performance?