None like this, as it would work even for vanillas. I am partial to The Headmaster, because I am that sort of perv. This game's predecessor, Once in a Lifetime, is not only great, it is finished, so start there. Ripples is also excellent, even if my old ass can't handle the (accurate) dialogue. I will give a shout to Dreamlink here as well. It will play like a homage to this to start, but it has potential, and does not appear on "games like this" tab, ever, so needs to be searched.