Place it near the end of an anime edit, right after the moment of obsession is shown, then follow it with the awkward moment sting to let the joke settle before the next scene, and use an anime ahh reaction earlier to set up the fixation.
Об этом звуке
This is a short French voice line, just over three seconds long, saying that she has become fixated on one thing. It feels playful and lightly mocking, turning a small obsession into a quick joke rather than a serious complaint. The clip comes from Blue Lock.