What's this thing? (5K)

"Seven Notes·Chattering" is the thirty-sixth Seven Notes in the history of Holy Sound, and also the last one; the composer is... our esteemed principal."

Professor Delaman waved the Magic Wand in his hand, drawing golden arcs in mid-air that turned into musical notes, eventually weaving into a complex and ornate score.

Delaman dragged the Magic Wand across the first note, and at the touch of the Wand, the notes emitted their corresponding sounds. Thus, a lofty and majestic melody, much like the roar of a lion, reverberated in the ears of every student, prompting them to recall the principal who had not shown his face for many years. It was as if they could see his once proud and spirited appearance.

To the point where, when the melody faded, everyone felt a melancholic regret in their hearts.

And Delaman clearly took pleasure in seeing his students' captivated expressions.