When Dusk Shine tries out a newly-revised teleportation spell, which he created with the aid of a book written by Swirly Star the Wise, it performs perfectly. Well, almost.
Trapped in a world where the Lords are Princesses and mare outnumber stallions four to one, he'll have to find a way back home before he is abducted by panting females who are just waiting to get him in their beds. To get home he must escape.... THE HEAT!
---
This is a one-shot story which is basically about Dusk Shine, the rule 63 of Twilight Sparkle, getting trapped in the 'normal' universe while all the mares of Equestria are in heat. Not to mention he is also an alicorn, but he hasn't been one for long.
Note: There is no intimacy in this story. At all.