Sorry, you can skip this if you want to. I'm just going to put all the sources I used.
The title of the book is from the song "What Will I Do With My Heart?" by The Eagles. It just struck me as something that would make a good story.
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What Will I Do With My Heart?
FanfictionGaster and Grillby are both unsure of what they would do if they lost each other, but they are soon to find out.