Perhaps this one
http://www.mangago.me/read-manga/junsui_adolescence/
http://www.mangago.me/read-manga/screengrab/ was the first thing i thought of
IT'S THIS ONE THANK YOUUUUUU BUT I'LL READ THE OTHERS TOO
http://www.mangago.me/read-manga/beloved_jaeliu/ IM SURE THIS ONE
IM SORRY I DIDNT SEE THAT YOU FOUND IT
HXISJDHDIJXDK IT'S OKAY THANK YOUUUUU
It's a yuri with a 16 years old and a 38 years old doctor---- that's all I remember FUUUUUUCK