The Last Man On Earth

I've been reading this comic called... well, see the topic title. Anyway. Good story, Dystopian future, society falls apart Yada Yada. That being said does anyone know of any anime/manga (preferably H but it doesnt have to be) with the same setting? The Last Man On Earth?

EDIT: Or Eroge

WORLD'S END HAREM should do the trick for you.

Oooh, looks like a good one