Heh, I played Strawberry Vinegar... and also got killed by the demoness. Need to pick up the game again.
And I recommend The Sad Story of Emmeline Burns. Is a kinda short kinetic novel (No choices). But the art is beautiful and the story and writing are fantastic.
To be honest, it make me cry... not only misty eyes. Was amazing.
Also, you might want to check the other Hanako Games besides A Little Lily Princess.
Black Closet.
Lots of mystery solving, conspirancy and lesbians. And traitors.
Long Live the Queen also have lesbian options... if you can survive long enough. Which I can't. But, guess that other people will not be as me, absolutly useless in playing the game. >_<
And Magical Diary has two yuri routes. I just loved Ellen, the nerdy roommate.