Madoromi Barmaid (sleeping barmaid) is a story about Tsukikawa, a girl who works periodicaly (whenever she wants) in some random place, and every night the manga bring to us some new characters who will be helped by our heroine with her tasty drinks. I'm writing it right after the ending of the 1st volume (Chaps 1-7)
It's a simple premise but really heart-warming, the art is not bad, I would say it's really beautiful (not comparing to nothing that already exists).
The characters do not last too much, one different per chapter (excluding Tsukikawa friends).
Read it if you want to have a good time, I surely had.