FYI the technical fetish term for it is "size contrast"; super rare in yuri manga for inexplicable reasons, a bit easier to find in JAV, and probably too far off-topic to discuss western erotica derivations.
Always been a "thing" for me too, especially tall Japanese girls. >< As I mentioned above, I could definitely go for a series about these two. There could be reaching for high things, carrying in her arms, hugs where the short partner gets smothered in cleavage, yummy stuff!