Rating: PG-13 / Teen and Up
Cautions: Sentinel AUs typically involve a soulmate-type trope. This one notes that Tony and Steve are not each other's be-all-and-end-all, and that they waited for each other not out of necessity, but choice. If you have any questions about it, feel free to comment on this post.
Length: 1 hours 33 minutes 46 seconds
cover by me!