Place it right after the line in a short edit, then follow it with a vine boom for emphasis, and add an anime wow only if the reaction escalates further. Keep it as the middle reply, with the larger sounds around it carrying the punch.
關於此聲音
This is a brief 1.5-second vocal clip built around a drawn-out mmm hum. The sound feels awkward and teasing at once, like someone holding back a comment while making the discomfort obvious, which makes it land as a silly, knowing nudge rather than a straight joke.