Help finding a hentai!

I read a hentai manga on Fakku a while back, even before the subscription system was implemented. It was long - 10+ chapters if I remember correctly. Its setting was a compound within a dystopian society where there were very few males left in the world, and all the females were named after flowers (Rose, Gardenia, etc.). The main male character had long blonde hair to the point where he looked like a girl. I think part of the plot revolved around the fact that humans weren't reproducing anymore, and I remember there being some sort of ominous room in the compound where the girls were sent for some sort of punishment (which might have been pregnancy). For the life of me I just can't remember the name of the manga, so any help is appreciated!

That's the one! Thanks a lot!