
Lol XD
I read a lot of the ones who are still students and are in love with someone older than them XD
So I've seen a lot and it's really cute especially since they ain't stupid and really are matured XD
Also most of the time 16 yrs olds in mangas are already matured enough and already know what's right from wrong so yuh XD

Here are some i found after looking through some of mine. I'm listing a few different types because I'm not sure of your preferences, and I read almost anything haha...
https://www.mangago.zone/read-manga/boku_no_osekkai_darling/
Not really the ages we were talking about, but still has a decent age gap
https://www.mangago.zone/read-manga/ayashi_no_hakoniwa_ni_ukabu_tsuki/
High-schooler demon and human teacher
https://www.mangago.zone/read-manga/monster_master/
If you read omegaverse, these are pretty sweet:
https://www.mangago.zone/read-manga/kiraide_isasete/
https://www.mangago.zone/read-manga/sayonara_alpha/
If you want to search for yourself, I suggest these tags :)
https://www.mangago.zone/tag/Older+lover/
https://www.mangago.zone/tag/age+gap/
I'm still trying to figure out if you can pair tags together to narrow your search. Please tell me if you know how ( ̄∇ ̄")
I have no problem with age gaps as long as...
Both of them are matured enough, They ain't stupid, 16+, seme/uke isn't being manipulated by the older one, both of them loves each other XD