What anime/manga have a character almost like miranda lotto from d gray man?

Have you seen Karin?? Its about vampires.... The mom of the guy Karin likes is super depressed half the time and she cant keep a job worth crap because she is so beautiful tho she has had plenty of jobs. She really wants to help her son and stuff but she cant cuz of loosing her jobs. Its a good anime you should watch it ^_^