I am searching for a wonderful fic in which Stiles and Derek live happily to be grandparents, with a large family. Derek dies of old age before Stiles and leaves for him in the attic a dresser stuffed with love letters. It is overwhelmingly poignant. [I wish there were a tag for Stiles and Derek as happy grandparents, dealing with their children's adventures!]
This sounds an awful lot like
“Just to See You Again” by MellytheHun (loserchildhotpants)
(E| 9/9| 14,950| Complete)
A sterek college!AU where writing student Stiles specializes in love letters, runs a blog about it and can be commissioned to write love letters on behalf of lovers who are at a loss for words.
He makes some cash, he’s good at what he does (especially when he gets to be a little more explicit in his letters), it pays for his textbooks and that’s all he’s really looking for and life is fine. That is, until someone anonymously commissions him to write a love letter to mathematics student, Derek Hale.