Manga with large age gap? Can be yaoi or hetero. I'm craving (づ￣ ³￣)づ

Kokoro (kanda neko)

http://www.mangago.zone/read-manga/bachi_bachi_kijima_hyougo/
has some age gaps in it

http://www.mangago.zone/home/mangalist/62595/
I hope any of these help

Basically all of Naono Bohra's works.

http://www.mangago.zone/people/tag/2337/Age+Gap/

http://www.mangago.zone/read-manga/always_kind