Place it at the very end of a classroom or study scene, after a stretch of keyboard typing for homework, then follow it with hurried footsteps and chairs moving as everyone leaves the room together.
关于此声音
A bright school bell rings in a clear, repeated pattern for about ten and a half seconds, the familiar campanella that marks the start and end of lessons in Italy. It feels urgent and nostalgic at once, instantly bringing back crowded hallways, desks scraping, and that rush of relief when the school day is finally done.