Fic: Fast Forward and Rewind (Marvel Cinematic Universe)

Fast Forward and Rewind (5108 words) by Shuufleur
Chapters: 1/1
Fandom: Marvel Cinematic Universe, The Avengers (Marvel Movies), Iron Man (Movies)
Rating: Teen And Up Audiences
Warnings: No Archive Warnings Apply
Relationships: Bruce Banner & Tony Stark
Characters: Tony Stark, Bruce Banner, Natasha Romanov (Marvel), Steve Rogers
Additional Tags: Post-Avengers: Infinity War Part 1 (Movie), Time Travel, Comic Book Science
Challenge: Written for past_imperfect 2018.
Summary: Tony didn't mean to build a time machine.