Put this clip just before the final reaction shot, so the sequence closes on the response rather than the attempt. Pair it ahead of Hello Darkness My Old Friend in longer edits, and use it on its own for shorter cuts that need one closing cue.
このサウンドについて
This clip is a 20-second music excerpt titled Nafile, credited in its upload to Mansur. It carries a wistful, resigned feeling, the kind that lingers after a point has already been missed. That mood makes the short excerpt sit less like background music and more like a quiet emotional punctuation mark for a scene.