Use it as the first reaction in a reaction edit, then follow it with the Nope meme sound when the claim is rejected, or the Roblox Oof sound when the moment turns into a fail.
關於此聲音
This is a very short spoken line, under a second long, asking “For real?” in a clipped, questioning voice. It carries a plain sense of disbelief, the kind that makes a wild claim feel even less convincing, with a touch of surprise and confusion. The line comes from Persona 5, the Atlus role-playing game released in 2016.