It doesn't have to be specifically shoujo-ai, just one where there aren't many male characters that muck up the story. Ex. El Cazador de la Bruja

Maria-sama ga Miteru

Strawberry Panic

Shoujo Kakumei Utena

[img]http://i32.photobucket.com/albums/d25/khmershinobi/b750d351697e8dd4b2600bce2a15e1e9-2-2.jpg[/img]

__ I'll have what she's having... please~♥

Kannazuki no miko

I linked previews to some of them
Noir
Burst Angel
Canaan (By far my favorite shoujo-ai esque anime)
Kiddy Grade
Kiddy Girl - And
Kuttsukiboshi not porn but still NSFW
Uta Kata
Mai Hime
Mai Otome
Aoi Hana
Simoun
Koihime Musou
Aria
Yuru Yuri The absence of male characters is extreme...not mention of a single one
Kanamemo
Blue Drop
Revolutionary Girl Utena
Puella Magi Madoka Magica an exceptionally popular anime that came out this year (an autographed poster auctioned for $6,000+) but don't be fooled by it's PG premise, it's 100% not for young audiences 😔
Mahou Shoujo Lyrical Nanoha
Ikkitousen so. much. fanservice.
Queen's Blade definitely not suitable for a work environment...unless you work with a bunch of fanboys in a porn shop though this is not porn, just lots of ecchi
Witch Blade
Sengoku Otome
Shigofumi
To aru no railgun

Jeez now that i'm reviewing the list there's a lot of weird stuff out there....anyhoo! hope you find what it is you're looking for!

Third all Revolutionary Girl Utena recs, best shojo-ai anime.
Also second Simoun.
Some people consider The Rose of Versailles to be shojo-ai (there is definitely some unrequited female-on-female crushing) and I definitely recommend that wonderful anime! However, there are quite a few men in the cast. You might be better off watching Oniisama e... (really surprised this wasn't mentioned already!!) which is based of a manga by the same mangaka and is actually shojo-ai in an all-girls school. Lots of drama.

@caozhi
holy crap! 😲 i didn't know there was that many shoujou-ai anime out there. Thank you for the links. I didn't know Witch Blade was shoujou-ai. I never watched it i just heard of the comics. Also thanks for the warnings. I can't tell you how many times i been watching a SUPPOSEDLY clean anime, then BAM in your face porn action. AWKWARD. 🤣

i kno right? there's a whole lot (a WHOLE LOT) more BL manga than there is GL but interesting enough there is actually more GL anime than BL. Strange but I still win in this scenario.

you missed one of the best ones caozhi, Sasameki Koto!!

Some people are like slinkies, not really good for anything but they bring a smile to your face when pushed down the stairs. 🙂