Hey, haven't updated in a while but there's a field trip story on AO3 called, I. Am. Spider-Man by lisa_yo
It takes place after Endgame.

Here's the link: https://archiveofourown.org/works/18806527/chapters/44623549

Edit: Should have told you this earlier but read the tags for the story on AO3. If you cried during Endgame then you might cry reading this.

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