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If there's a book you want to read, but it hasn't been written yet, then you must write it. Toni Morrison
If we had this one, I'd expect to find it in the Anju and Kefei folder on Characters.The Legend Of Zelda Majoras Mask, but the closest there is Tiny Guy, Huge Girl.
If the change is in the direction of compatibility, it could fall under Shapeshifting Lover, depending on the details.
Edited by Scorpion451
I think not. I mean like, Charlie falls in love with Alice after being de-aged (and vice-versa).
If there's a book you want to read, but it hasn't been written yet, then you must write it. Toni Morrison
Too specific a case.
We can never truly eradicate the coronavirus, but we can suppress its threat like influenza
I'm not convinced this is Too Rare to Trope myself (there are a lot of Overnight Age-Up and Fountain of Youth stories), but the aforementioned squick and Values Dissonance might make it Too Dangerous.
Star-Crossed Lovers is probably the best place to file examples where they would be compatible if not for the highjinks.
Like in Adventure Time when Bubblegum fell for Finn when she aged down five years? You could always try putting this idea through TLP.
May you make it first? (I suck at doing things)
If there's a book you want to read, but it hasn't been written yet, then you must write it. Toni Morrison
Yeah, I can think of examples as well, but I'm not sure we have this.
"It's just a show; I should really just relax"
I agree that it is way too specific
When a character falls in love with another character after being aged-down. May be Squiky because of the implications.