The novelette "Six Months, Three Days" by Charlie Jane Anders is short and (mostly) sweet, very poignant. The premise is intriguing and the result is excellent.

It's so short that almost any discussion would be a spoiler, but it's a story about a relationship where one person has a power that tells them how it ends and the other has a power that shows them many ways it could go. It plays with ideas of knowledge and certainty through the lens of each person's ability. It's a pretty quick read but well worth the time.