My Last Chance

Ash has not only become the first Champion of the Alola League, but has also defeated the Masked Royal, revealed to be Professor Kukui, and Tapu Koko, cementing himself as the strongest trainer in the Alola region. Naturally, his friends and especially his classmates are overjoyed, but one in particular who had already greatly admired him was experiencing a new feeling. After a revelation that she'll be leaving to search for her missing father and that Ash will be returning to Pallet Town, Lillie realizes that her days with him are numbered. She needs to do something, but how can she do so when the person in question is about as dense as a black hole. Or so she thinks... (Aureliashipping; Post-Alola League mini-AU [basically, what if Lillie had an actual crush on Ash following the Alola League])