Strangely enough, this was my very first manga. Read it back in 2010 or so. Sadly, translations got dropped altogether, and I only recently found out that this piece has well over 100 chapters waiting to be translated
I adore this manga, it has a very Sherlock Holmes vibe to it. Although the Sherlock Holmes character (Tsubaki) has been gender flipped to avoid the homoerotic undertones that comes from the intimate relationship between Sherlock and Watson. But I feel that Kanji Kawashita has really woven this simple change into the story narrative. One slight downside to this serialisation is G.R.R. Martian approach to character disposal, in that it feels like most female character are very likely to meet a grizzly death.