Kuroshitsuji

Kuroshitsuji by Yana Toboso translates to Black Butler and if you say it fast enough it sounds like a curse word! JK

Kuroshitsuji started as a manga

and then proceeded as an anime

With two seasons!

and then a musical came out! 

Ahh! but its so good!! even though I didn't understand half of the things they were saying/singing!!

They are available on Youtube! and there are TWO musicals out!! Its so good!! ^^ enjoy~

more info.