A KageHina (Haikyuu!!) fanfic! Humming and singing, to their own surprise, had become an important thing in their relationship. So important that it plays a part even when Hinata and Kageyama are being held hostage in a store robbery. (This work was originally posted on AO3 and is also available as Podfic. https://archiveofourown.org/works/36009445)