I just finished watching another anime series called Kuroshitsuji which ended broadcasting last month in Japan. This is a rather dark tale based on the old days of London. One of the high class noble families called Phantomhive is known to have been loyal to the Queen. The demon butler, Sebastian Michaels who is perfect at everything possible has made a contract with the 12 year old boy Ciel Phantomhive to serve and protect him until he takes revenege for his dead parents.
I got into this because its one of the animations done by Square ENIX and the style is more dark compare to the other anime I've seen recently.