Fics like The One Where Peter is the Little Merman and Tony is the Human that Catches his Eye

Once upon a time there was a merman that saved a superhero then made an ill-thought-out deal with a villain to find him again. There are communication barriers and heart-on-his-sleeve pining, but they work out a way to be part of each other’s world and be happy ever after. Little Mermaid AU, Peter x Tony Now with bonus chapter, "Peter's First Christmas"

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