Put it near the end of a teasing exchange, after a Bruh reaction and before the other person reacts, then follow it with Emotional Damage to sell the aftermath and finish with a short laugh.
關於此聲音
This is a short four-second clip of a cute, high-pitched voice saying 'onee chan, fk you' in a sweet, teasing tone. The contrast between the adorable delivery and the rude words makes it funny and surprising, perfect for a playful insult that lands softer than it sounds.