Place it at the close of a negotiation scene in your edit, right after the on-screen agreement is shown. Follow it with a Bell Ding to mark the confirmation, then return straight to dialogue so the paperwork gag stays as the final beat.
이 사운드에 대해
Contracts 87 is a brief 2.8-second sound effect named for a numbered contract, giving listeners a dry, final, paperwork-done feeling that lands like a deal being closed and filed away for good. It suits that small pause after terms are agreed, when the joke is that everything is now official and nobody can back out of the bit anymore.