It isn't Shounen Ai because in the original story "Sherlock Holmes" I don't recall Sherlock and Moriarty being together. The author of this manga is, obviously, writing the story while respecting the original story "Sherlock Holmes"
The author is writing a manga that is from a very popular story. If there's anything that shouldn't be written then it would be romance that never even happened in the original and one that is most likely not acceptable to the public at that. This is a Seinen manga and I'd like it to stay that way.
Calm down dude it was just a fans fiction. And I also ship them, but of course they are not an item. ╮( ̄▽ ̄)╭ and its a gem in its genre, and I also love it the way it is. Its just that some reader's mind( sometimes mine also) work on pairing non gay or even gay characters for fun, and sometimes we write it down to share the fun. Not to disrespect the author of either works.
(=・ω・=)
Dude i am just a fan of the ship wish it would be real and not demanding it. The authors does an excellent job on thier version od sherlock and Moriarty. It is not wrong of me to look at their relationship through a rose color lens.heck there are a lot of manga that has a similar theme to this and people still ship the characters

The roof top scene was hottt!!! Can someone please tell why it's not at least shounen ai? Cause Sherlock X Moriarty is the best!