Saas-Fee Magic

The pristine landscape of Saas-valley had been the perfect settlement for many who'd stumbled upon the hidden gem. Over the years, more small villages scattered the lush alpine meadows giving rise to civilization.
Then one stormy night an avalanche the size of which none had ever seen, nearly wiped out a whole village. Saas-Balen was left with few residents most of whom were children. To avoid the impending extinction, Saas-Fee and Saas-Balen went into an agreement. Saas-Fee will provide spouses to Saas-Balen residents and help them restore their village to its former glory.
The system devised paired up families from each village to ensure that everyone got a spouse. Once the children of Saas-Fee were of age they are sent to Saas-Balen to be wed.
The system worked flawlessly for years. Though along the way there had been some hiccups the village heads had managed to address them. Thus the tradition survived over many generations, ensuring a lasting partnership between the two villages. It was considered a grave offense for one to break the pairing law, punishable by a jail sentence.

Disclaimer: This narration is purely fictional though the characters are not. I do not own any of the images/media used in the story. Credit to the respectful owners.