Place it at the end of a failed attempt, after the action has already gone wrong, so it works as the closing reaction. Follow it with Tuturu for an anime payoff, or open with Anime Ahh before the mishap to set up the contrast.
關於此聲音
This short voice clip has Kotori saying 'shikatanai ne, man' in a soft, resigned tone that turns a small defeat into a playful shrug. It gives a listener a warm, sheepish feeling, like accepting a lost argument without making a fuss about it. The line comes from Rewrite, where Kotori uses it as her easygoing way of accepting what cannot be changed.