I'm a fan of age steal/swap stories. Here are the ones I know.
Manga
Zekkyou Gakkyuu
High school girl pays the price for forsaking her aging mother.
https://bato.to/chapter/1129130/5
Fics
Backfire(in attachment)
High school girl receives a special ring from her mother that lets her improve herself but backfires on her in the end.
Coming of Age(in attachment)
A woman in her 20's bad mouths a elderly woman and soon finds herself rapidly aging.