Plot: There was this high school girl who wanted to be a high school detective. But she sucked at math and was constantly getting scolded by her math teacher. She had a friend, a bishoujo high school girl. The both of them worked as maids at the local town diner. It wasn't a proper maid cafe and was run by an old lady. The plainer looking high school girl had a younger sister and brother. And what's this manga about? Not sure. Sometimes the characters had run-of-the-mill adventures but there were some chapters related to the supernatural. The high school girl's nemesis was the town cop. Anyone knows the title?