Knowing the way things work in the ecchiverse, they probably all have day jobs as school nurses too.
Dokki! Onnadarake no Muzintou – First Impact (1 volume, complete)
Yeah sure, this one is more hentai than ecchi. Not quite full-on super explicit hentai, but certainly in that grey area between the two genres. I don’t normally want to post stuff like this, but this was a must-share.