the one where Steve's singing is like protection

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I remember someone gave a prompt of Steve singing stuff into existence or something.

In the fic, Grace and Danny are captured and Grace asks Danny if he hears Steve's singing and Danny figures it's her way of coping with the situation.

I thought I had it bookmarked and maybe I do, but I can't find it

I'd post this at the fic finder community, but I feel like I use that place far too much.