I've been trying to find this manga for years.
The title was kind of long.
I'll describe it:
It appears the world lost all men.
It takes place at a privileged school.
There is a fancy walled garden inside where something like a kiss or something would bond together girls at the school.
I remember a chapter where the main character was trying to prune the garden wall as a task.
What stands out about the series is how people reproduce.
The manga artist came up with a rather complicated way how humans have evolved so women can reproduce with each other. Something about stigma to stigma plant reproduction was mentioned, I think.
The artist said that their editor told them to drop the lengthy explanation, since it bordered on scifi.
Any thoughts?
could it be Love DNA XX or Eden no Otome?