manga!!!!!!!!!!!!

i have two questions, first is that i have seen the Anime inu x boku but where do i start with the manga, i mean what chapter and saat is that i have taken a liking to the Manga undertaker riddle, do anda know one like it thank you!

and btw undertaker riddle is Supernatural comedy with a eetsi peetsi little shounen ai
and i already have seen: uraboku, black butler, loveless, sukisho,

se pic: undertaker riddle