Holy Night Reverie was a time-limited event in King's Knight -Wrath of the Dark Dragon-. It was originally issued in advance of Christmas 2017.
Vita, Karen, and some friends want to put on a show for the upcoming Holy Night festival. But with Fiends mucking about, someone broke in and stole the sheet music and band gear days before. Vita must get to the bottom of this whodunit and get the gear back, else the performance will be a disaster.