Place it just before the reveal, then follow it with an Inception Horn Sound Effect for the payoff and a Pop Sound Effect to mark the moment the wait ends, keeping the apology as the bridge between buildup and reveal.
关于此声音
This is a short voice clip of about 2.6 seconds in which a speaker says “sorry to keep you waiting” in a steady, unhurried voice. It feels courteous with a sly edge, making a late arrival sound deliberate instead of clumsy. The line comes from DELTARUNE Chapter 5, where its measured delivery fits a delayed entrance.