I saw the title page for Tsubomi 12 a couple years ago, and instantly fell in love with it, but I couldn't ever find it, but after going through every volume of tsubomi, I can happily say it was worth the search. Really interesting one-shot, the type that makes you wish it was a full manga.
As for the disintegration... "thus began the purging of the perverted men who wouldn't leave lesbians alone, never again did someone ask 'so who's the guy in the relationship?'"