I was about to ask a question about "hiding information in plain sight" on the main site when I realised that it could be too open ended. I looked into the help centre and couldn't find anything mentioning my problem in there. (It said that questions about using writing techniques are acceptable, but I don't think that my question falls into this)
I also looked at Are “How Could” questions on topic?
My question would have been this:
How can I hide a second narrative within my story? (using time travel)
For simplicity, let's assume that I wrote a short story which ends in the main character going back in time to the beginning of the story, becoming a background character.
The reader would have no knowledge of this until they reached the end of the story, and upon reading it for a second time they would pick up small, previously unnoticed details that somehow reveal a second narrative in "what happens next", effectively making the story its own sequel.
How can I ensure that the majority of readers won't notice these details, so that they come as something new upon re-reading it?
If I could word my question to yield specific answers, perhaps it would better fit the style of a SE. Is my question acceptable as it is, or should I re-word it (or not ask)?